2:30 p.m.
Composers reuse melodic material across different instruments. I would like
to do that in Vivid. I would keep a sequence of values and send it
sometimes to one parameter of one synth, sometimes to a different parameter
of a different synth.
To do that I would have to coerce those numbers to values of type `I a`,
where the string `a` is known only at runtime. I tried to write a function
to do that:
import GHC.TypeLits
toIOf :: (Real n, GHC.TypeLits.KnownSymbol a) => String -> n -> I a
toIOf "freq" n = toI n :: I "freq"
toIOf "amp" n = toI n :: I "amp"
but it won't compile, because the outputs of `toIOf "freq"` and `toIOf
"amp"` have different types.
Is this possible?
--
Jeff Brown | Jeffrey Benjamin Brown
Website <https://msu.edu/~brown202/> | Facebook
<https://www.facebook.com/mejeff.younotjeff> | LinkedIn
<https://www.linkedin.com/in/jeffreybenjaminbrown>(spammy, so I often miss
messages here) | Github <https://github.com/jeffreybenjaminbrown>
3:42 p.m.
Hi Jeffrey,
On 04/07/18 13:30, Jeffrey Brown wrote:
Composers reuse melodic material across different instruments. I
would
like to do that in Vivid. I would keep a sequence of values and send
it sometimes to one parameter of one synth, sometimes to a different
parameter of a different synth.
To do that I would have to coerce those numbers to values of type `I
a`, where the string `a` is known only at runtime. I tried to write a
function to do that:
import GHC.TypeLits
toIOf :: (Real n, GHC.TypeLits.KnownSymbol a) => String -> n -> I a
toIOf "freq" n = toI n :: I "freq"
toIOf "amp" n = toI n :: I "amp"
but it won't compile, because the outputs of `toIOf "freq"` and `toIOf
"amp"` have different types.
In GHC Haskell the "different types" issue can be partly
solved/worked-around by using RankNTypes with a continuation-passing
style (here the argument 'h' is used at two different types inside 'f',
using Proxy and Typeable just as examples for a simple standalone
program - I'm not familiar with Vivid):
--8<--
{-# LANGUAGE RankNTypes #-}
{-# LANGUAGE DataKinds #-}
import Data.Proxy
import Data.Typeable
import GHC.TypeLits
g t = show (typeOf t)
f :: String -> (forall s . KnownSymbol s => Proxy s -> r) -> r
f "freq" h = h (Proxy :: Proxy "freq")
f "amp" h = h (Proxy :: Proxy "amp" )
main = do
putStrLn $ f "freq" g
putStrLn $ f "amp" g
--8<--
This has the limitation of having to list every possible String/Symbol
pair manually inside f. The 'reflection' package has a reifySymbol to
make this technique work with arbitrary runtime arguments:
https://hackage.haskell.org/package/reflection-2.1.4/docs/Data-Reflection...
An approach that might work depending on the "role annotations" of the
'I' type constructor, is to create everything with a dummy Symbol, that
you can pass around with a String representing the desired final name,
and at the last minute use the above technique with Data.Coerce.coerce
to change the Symbol (eg replacing the typeOf in g). "coerce" is safe
when allowed.
Claude
--
https://mathr.co.uk
6:50 p.m.
The approach I'd use might be a little different. Vivid offers a "toI"
function which takes any number and converts it to an "I".
So for example:
```
myNums = [1..10] :: [Double]
sd0 = undefined :: SynthDef '["freq"]
sd1 = undefined :: SynthDef '["amp"]
main = do
s0 <- synth sd0
s1 <- synth sd1
forM_ myNums $ \n -> do
set s0 (toI n :: I "freq")
set s1 (toI n :: I "amp")
```
Also: "toI" works on any numeric type (any "Real n"), and
"I" itself is a numeric type. So you can always write:
x = 5 :: I "freq"
y = toI x :: I "amp"
Tom
El 4 jul 2018, a las 08:30, Jeffrey Brown
<jeffbrown.the(a)gmail.com> escribió:
Composers reuse melodic material across different instruments. I would like to do that in
Vivid. I would keep a sequence of values and send it sometimes to one parameter of one
synth, sometimes to a different parameter of a different synth.
To do that I would have to coerce those numbers to values of type `I a`, where the string
`a` is known only at runtime. I tried to write a function to do that:
import GHC.TypeLits
toIOf :: (Real n, GHC.TypeLits.KnownSymbol a) => String -> n -> I a
toIOf "freq" n = toI n :: I "freq"
toIOf "amp" n = toI n :: I "amp"
but it won't compile, because the outputs of `toIOf "freq"` and `toIOf
"amp"` have different types.
Is this possible?
--
Jeff Brown | Jeffrey Benjamin Brown
Website | Facebook | LinkedIn(spammy, so I often miss messages here) | Github
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4:31 a.m.
Thanks, Claude! I'm working on moving your example into the Vivid context.
Tom, indeed, that would be simpler! I wanted to use `toI`. But I don't see
how to do that without hard-coding every choice of which parameter to send
a message to.
For instance, suppose you've got a list of parameter names
`["freq","amp"
..]` from which you want the code to choose a parameter `p` randomly every
cycle, and set it to the value `x`. You can't write `set s (x :: I p)`,
because the `p` in `I p` is a type-level variable rather than an ordinary
one.
I considered keeping a list of functions `[setFreq, setAmp ..]` instead of
a list of parameter names, but I haven't found how to represent such a list:
.
On Wed, Jul 4, 2018 at 11:50 AM <amindfv(a)gmail.com> wrote:
:set -XDataKinds
:set -XRankNTypes
s <- synth boop ()
[set s (3::I "amp"), set s (5::I "freq")]
<interactive>:194:22: error:
• Could not deduce: Elem "freq" '[] arising from a use of ‘set’
from the context: VividAction m
bound by the inferred type of it :: VividAction m => [m ()]
at <interactive>:194:1-41
• In the expression: set s (5 :: I "freq")
In the expression: [set s (3 :: I "amp"), set s (5 :: I
"freq")]
In an equation for ‘it’:
it = [set s (3 :: I "amp"), set s (5 :: I "freq")]
The approach I'd use might be a little different. Vivid offers a
"toI"
function which takes any number and converts it to an "I".
So for example:
```
myNums = [1..10] :: [Double]
sd0 = undefined :: SynthDef '["freq"]
sd1 = undefined :: SynthDef '["amp"]
main = do
s0 <- synth sd0
s1 <- synth sd1
forM_ myNums $ \n -> do
set s0 (toI n :: I "freq")
set s1 (toI n :: I "amp")
```
Also: "toI" works on any numeric type (any "Real n"), and
"I" itself is a
numeric type. So you can always write:
x = 5 :: I "freq"
y = toI x :: I "amp"
Tom
El 4 jul 2018, a las 08:30, Jeffrey Brown <jeffbrown.the(a)gmail.com>
escribió:
Composers reuse melodic material across different instruments. I would
like to do that in Vivid. I would keep a sequence of values and send it
sometimes to one parameter of one synth, sometimes to a different parameter
of a different synth.
To do that I would have to coerce those numbers to values of type `I a`,
where the string `a` is known only at runtime. I tried to write a function
to do that:
import GHC.TypeLits
toIOf :: (Real n, GHC.TypeLits.KnownSymbol a) => String -> n -> I a
toIOf "freq" n = toI n :: I "freq"
toIOf "amp" n = toI n :: I "amp"
but it won't compile, because the outputs of `toIOf "freq"` and `toIOf
"amp"` have different types.
Is this possible?
--
Jeff Brown | Jeffrey Benjamin Brown
Website <https://msu.edu/~brown202/> | Facebook
<https://www.facebook.com/mejeff.younotjeff> | LinkedIn
<https://www.linkedin.com/in/jeffreybenjaminbrown>(spammy, so I often
miss messages here) | Github <https://github.com/jeffreybenjaminbrown>
_______________________________________________
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To unsubscribe send an email to livecode-leave(a)we.lurk.org
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To unsubscribe send an email to livecode-leave(a)we.lurk.org
--
Jeff Brown | Jeffrey Benjamin Brown
Website <https://msu.edu/~brown202/> | Facebook
<https://www.facebook.com/mejeff.younotjeff> | LinkedIn
<https://www.linkedin.com/in/jeffreybenjaminbrown>(spammy, so I often miss
messages here) | Github <https://github.com/jeffreybenjaminbrown>
6:51 a.m.
It works!
set' :: (Subset '["freq","amp"] sdArgs, Real n,
VividAction m)
=> String -> Node sdArgs -> n -> m ()
set' "freq" s n = set s (toI n :: I "freq")
set' "amp" s n = set s (toI n :: I "amp")
This has a property that, depending on your point of view, you could call a
disadvantage or a feature: `set'` can only send messages to synths
(`Node`s) for which "freq" and "amp" are both valid parameters. If
you
wanted to use it with a lot of unique synths, and their parameters have
unique names, then you would have to make every synth recognize all the
parameters of all the others. (Those extra parameters could be no-ops, part
of the type signature but unused in the definition.)
I'm in kind of a weird place, fighting with Vivid's brilliant type safety.
Is there a theoretical maximum to the number of parameter names `set'`
could be defined for? I tried 33 and it compiled.
On Wed, Jul 4, 2018 at 9:31 PM Jeffrey Brown <jeffbrown.the(a)gmail.com>
wrote:
Thanks, Claude! I'm working on moving your example into the Vivid
context.
Tom, indeed, that would be simpler! I wanted to use `toI`. But I don't see
how to do that without hard-coding every choice of which parameter to send
a message to.
For instance, suppose you've got a list of parameter names
`["freq","amp"
..]` from which you want the code to choose a parameter `p` randomly every
cycle, and set it to the value `x`. You can't write `set s (x :: I p)`,
because the `p` in `I p` is a type-level variable rather than an ordinary
one.
I considered keeping a list of functions `[setFreq, setAmp ..]` instead of
a list of parameter names, but I haven't found how to represent such a list:
.
> :set -XDataKinds
> :set -XRankNTypes
> s <- synth boop ()
> [set s (3::I "amp"), set s (5::I "freq")]
<interactive>:194:22: error:
• Could not deduce: Elem "freq" '[] arising from a use of ‘set’
from the context: VividAction m
bound by the inferred type of it :: VividAction m => [m ()]
at <interactive>:194:1-41
• In the expression: set s (5 :: I "freq")
In the expression: [set s (3 :: I "amp"), set s (5 :: I
"freq")]
In an equation for ‘it’:
it = [set s (3 :: I "amp"), set s (5 :: I "freq")]
>
On Wed, Jul 4, 2018 at 11:50 AM <amindfv(a)gmail.com> wrote:
> The approach I'd use might be a little different. Vivid offers a "toI"
> function which takes any number and converts it to an "I".
>
> So for example:
>
> ```
> myNums = [1..10] :: [Double]
>
> sd0 = undefined :: SynthDef '["freq"]
> sd1 = undefined :: SynthDef '["amp"]
>
> main = do
> s0 <- synth sd0
> s1 <- synth sd1
> forM_ myNums $ \n -> do
> set s0 (toI n :: I "freq")
> set s1 (toI n :: I "amp")
> ```
>
> Also: "toI" works on any numeric type (any "Real n"), and
"I" itself is a
> numeric type. So you can always write:
>
> x = 5 :: I "freq"
> y = toI x :: I "amp"
>
> Tom
>
>
> El 4 jul 2018, a las 08:30, Jeffrey Brown <jeffbrown.the(a)gmail.com>
> escribió:
>
> Composers reuse melodic material across different instruments. I would
> like to do that in Vivid. I would keep a sequence of values and send it
> sometimes to one parameter of one synth, sometimes to a different parameter
> of a different synth.
>
> To do that I would have to coerce those numbers to values of type `I a`,
> where the string `a` is known only at runtime. I tried to write a function
> to do that:
>
> import GHC.TypeLits
> toIOf :: (Real n, GHC.TypeLits.KnownSymbol a) => String -> n -> I a
> toIOf "freq" n = toI n :: I "freq"
> toIOf "amp" n = toI n :: I "amp"
>
> but it won't compile, because the outputs of `toIOf "freq"` and `toIOf
> "amp"` have different types.
>
> Is this possible?
>
> --
> Jeff Brown | Jeffrey Benjamin Brown
> Website <https://msu.edu/~brown202/> | Facebook
> <https://www.facebook.com/mejeff.younotjeff> | LinkedIn
> <https://www.linkedin.com/in/jeffreybenjaminbrown>(spammy, so I often
> miss messages here) | Github
> <https://github.com/jeffreybenjaminbrown>
>
> _______________________________________________
> Livecode mailing list -- livecode(a)we.lurk.org
> To unsubscribe send an email to livecode-leave(a)we.lurk.org
>
> _______________________________________________
> Livecode mailing list -- livecode(a)we.lurk.org
> To unsubscribe send an email to livecode-leave(a)we.lurk.org
>
--
Jeff Brown | Jeffrey Benjamin Brown
Website <https://msu.edu/~brown202/> | Facebook
<https://www.facebook.com/mejeff.younotjeff> | LinkedIn
<https://www.linkedin.com/in/jeffreybenjaminbrown>(spammy, so I often
miss messages here) | Github <https://github.com/jeffreybenjaminbrown>
--
Jeff Brown | Jeffrey Benjamin Brown
Website <https://msu.edu/~brown202/> | Facebook
<https://www.facebook.com/mejeff.younotjeff> | LinkedIn
<https://www.linkedin.com/in/jeffreybenjaminbrown>(spammy, so I often miss
messages here) | Github <https://github.com/jeffreybenjaminbrown>
9:28 p.m.
Interesting solution! Here's how I might solve it (wanting to set a random parameter
of a synth that's playing):
s <- synth foo ()
-- Randomly pick one from the list:
set' <- pick [
\n -> set s (toI n :: I "freq")
, \n -> set s (toI n :: I "amp")
, \n -> set s (toI n :: I "foobar")
]
set' 35
(You can eliminate the "\n ->" too but thought I'd show the more general
case)
To answer your specific questions:
- Yes, it's definitely intentional that Vivid only lets you set parameters the synth
has. If you really need to get around it I've built in a few escape hatches (which I
can describe), but I've used Vivid nearly every day for a few years now and
haven't needed it so far.
- There's no maximum to the number of arguments set' could have. In the worst
case (thousands of them?) it could slow down your compilation, but it shouldn't slow
down runtime at all.
Tom
El 5 jul 2018, a las 00:51, Jeffrey Brown
<jeffbrown.the(a)gmail.com> escribió:
It works!
set' :: (Subset '["freq","amp"] sdArgs, Real n,
VividAction m)
=> String -> Node sdArgs -> n -> m ()
set' "freq" s n = set s (toI n :: I "freq")
set' "amp" s n = set s (toI n :: I "amp")
This has a property that, depending on your point of view, you could call a disadvantage
or a feature: `set'` can only send messages to synths (`Node`s) for which
"freq" and "amp" are both valid parameters. If you wanted to use it
with a lot of unique synths, and their parameters have unique names, then you would have
to make every synth recognize all the parameters of all the others. (Those extra
parameters could be no-ops, part of the type signature but unused in the definition.)
I'm in kind of a weird place, fighting with Vivid's brilliant type safety.
Is there a theoretical maximum to the number of parameter names `set'` could be
defined for? I tried 33 and it compiled.
> On Wed, Jul 4, 2018 at 9:31 PM Jeffrey Brown <jeffbrown.the(a)gmail.com> wrote:
> Thanks, Claude! I'm working on moving your example into the Vivid context.
>
> Tom, indeed, that would be simpler! I wanted to use `toI`. But I don't see how to
do that without hard-coding every choice of which parameter to send a message to.
>
> For instance, suppose you've got a list of parameter names
`["freq","amp" ..]` from which you want the code to choose a parameter
`p` randomly every cycle, and set it to the value `x`. You can't write `set s (x :: I
p)`, because the `p` in `I p` is a type-level variable rather than an ordinary one.
>
> I considered keeping a list of functions `[setFreq, setAmp ..]` instead of a list of
parameter names, but I haven't found how to represent such a list:
> .
> > :set -XDataKinds
> > :set -XRankNTypes
> > s <- synth boop ()
> > [set s (3::I "amp"), set s (5::I "freq")]
>
> <interactive>:194:22: error:
> • Could not deduce: Elem "freq" '[] arising from a use of
‘set’
> from the context: VividAction m
> bound by the inferred type of it :: VividAction m => [m ()]
> at <interactive>:194:1-41
> • In the expression: set s (5 :: I "freq")
> In the expression: [set s (3 :: I "amp"), set s (5 :: I
"freq")]
> In an equation for ‘it’:
> it = [set s (3 :: I "amp"), set s (5 :: I "freq")]
> >
>
>
>> On Wed, Jul 4, 2018 at 11:50 AM <amindfv(a)gmail.com> wrote:
>> The approach I'd use might be a little different. Vivid offers a
"toI" function which takes any number and converts it to an "I".
>>
>> So for example:
>>
>> ```
>> myNums = [1..10] :: [Double]
>>
>> sd0 = undefined :: SynthDef '["freq"]
>> sd1 = undefined :: SynthDef '["amp"]
>>
>> main = do
>> s0 <- synth sd0
>> s1 <- synth sd1
>> forM_ myNums $ \n -> do
>> set s0 (toI n :: I "freq")
>> set s1 (toI n :: I "amp")
>> ```
>>
>> Also: "toI" works on any numeric type (any "Real n"), and
"I" itself is a numeric type. So you can always write:
>>
>> x = 5 :: I "freq"
>> y = toI x :: I "amp"
>>
>> Tom
>>
>>
>>> El 4 jul 2018, a las 08:30, Jeffrey Brown <jeffbrown.the(a)gmail.com>
escribió:
>>>
>>> Composers reuse melodic material across different instruments. I would like
to do that in Vivid. I would keep a sequence of values and send it sometimes to one
parameter of one synth, sometimes to a different parameter of a different synth.
>>>
>>> To do that I would have to coerce those numbers to values of type `I a`,
where the string `a` is known only at runtime. I tried to write a function to do that:
>>>
>>> import GHC.TypeLits
>>> toIOf :: (Real n, GHC.TypeLits.KnownSymbol a) => String -> n ->
I a
>>> toIOf "freq" n = toI n :: I "freq"
>>> toIOf "amp" n = toI n :: I "amp"
>>>
>>> but it won't compile, because the outputs of `toIOf "freq"` and
`toIOf "amp"` have different types.
>>>
>>> Is this possible?
>>>
>>> --
>>> Jeff Brown | Jeffrey Benjamin Brown
>>> Website | Facebook | LinkedIn(spammy, so I often miss messages here)
| Github
>>> _______________________________________________
>>> Livecode mailing list -- livecode(a)we.lurk.org
>>> To unsubscribe send an email to livecode-leave(a)we.lurk.org
>> _______________________________________________
>> Livecode mailing list -- livecode(a)we.lurk.org
>> To unsubscribe send an email to livecode-leave(a)we.lurk.org
>
>
> --
> Jeff Brown | Jeffrey Benjamin Brown
> Website | Facebook | LinkedIn(spammy, so I often miss messages here) |
Github
--
Jeff Brown | Jeffrey Benjamin Brown
Website | Facebook | LinkedIn(spammy, so I often miss messages here) | Github
_______________________________________________
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To unsubscribe send an email to livecode-leave(a)we.lurk.org
3:20 a.m.
no maximum
Nice!
Here's how I might
After half an hour of study I haven't figured out how to evaluate that.
:{
*Main|
*Main| main = do
*Main| s <- synth boop ()
*Main|
*Main| -- Randomly pick one from the list:
*Main| set' <- pick ( [ \n -> set s (toI n :: I "freq")
*Main| , \n -> set s (toI n :: I "amp")
*Main| , \n -> set s (toI n :: I "foobar")
*Main| ] -- :: [(Real n, VividAction m) => n -> m ()]
*Main| )
*Main| set' 35
*Main| :}
<interactive>:208:26: error:
• Could not deduce: Elem "foobar" '[] arising from a use of ‘set’
from the context: (MonadRandom m, VividAction m)
bound by the inferred type of
main :: (MonadRandom m, VividAction m) => m ()
at <interactive>:(202,1)-(211,9)
• In the expression: set s (toI n :: I "foobar")
In the expression: \ n -> set s (toI n :: I "foobar")
In the first argument of ‘pick’, namely
‘([\ n -> set s (toI n :: I "freq"),
\ n -> set s (toI n :: I "amp"),
\ n -> set s (toI n :: I "foobar")])’
On Fri, Jul 6, 2018 at 2:28 PM <amindfv(a)gmail.com> wrote:
Interesting solution! Here's how I might solve it (wanting to set
a random
parameter of a synth that's playing):
s <- synth foo ()
-- Randomly pick one from the list:
set' <- pick [
\n -> set s (toI n :: I "freq")
, \n -> set s (toI n :: I "amp")
, \n -> set s (toI n :: I "foobar")
]
set' 35
(You can eliminate the "\n ->" too but thought I'd show the more
general
case)
To answer your specific questions:
- Yes, it's definitely intentional that Vivid only lets you set
parameters the synth has. If you really need to get around it I've built in
a few escape hatches (which I can describe), but I've used Vivid nearly
every day for a few years now and haven't needed it so far.
- There's no maximum to the number of arguments set' could have. In the
worst case (thousands of them?) it could slow down your compilation, but it
shouldn't slow down runtime at all.
Tom
El 5 jul 2018, a las 00:51, Jeffrey Brown <jeffbrown.the(a)gmail.com>
escribió:
It works!
set' :: (Subset '["freq","amp"] sdArgs, Real n,
VividAction m)
=> String -> Node sdArgs -> n -> m ()
set' "freq" s n = set s (toI n :: I "freq")
set' "amp" s n = set s (toI n :: I "amp")
This has a property that, depending on your point of view, you could call
a disadvantage or a feature: `set'` can only send messages to synths
(`Node`s) for which "freq" and "amp" are both valid parameters. If
you
wanted to use it with a lot of unique synths, and their parameters have
unique names, then you would have to make every synth recognize all the
parameters of all the others. (Those extra parameters could be no-ops, part
of the type signature but unused in the definition.)
I'm in kind of a weird place, fighting with Vivid's brilliant type safety.
Is there a theoretical maximum to the number of parameter names `set'`
could be defined for? I tried 33 and it compiled.
On Wed, Jul 4, 2018 at 9:31 PM Jeffrey Brown <jeffbrown.the(a)gmail.com>
wrote:
> Thanks, Claude! I'm working on moving your example into the Vivid context.
>
> Tom, indeed, that would be simpler! I wanted to use `toI`. But I don't
> see how to do that without hard-coding every choice of which parameter to
> send a message to.
>
> For instance, suppose you've got a list of parameter names
`["freq","amp"
> ..]` from which you want the code to choose a parameter `p` randomly every
> cycle, and set it to the value `x`. You can't write `set s (x :: I p)`,
> because the `p` in `I p` is a type-level variable rather than an ordinary
> one.
>
> I considered keeping a list of functions `[setFreq, setAmp ..]` instead
> of a list of parameter names, but I haven't found how to represent such a
> list:
> .
> > :set -XDataKinds
> > :set -XRankNTypes
> > s <- synth boop ()
> > [set s (3::I "amp"), set s (5::I "freq")]
>
> <interactive>:194:22: error:
> • Could not deduce: Elem "freq" '[] arising from a use of
‘set’
> from the context: VividAction m
> bound by the inferred type of it :: VividAction m => [m ()]
> at <interactive>:194:1-41
> • In the expression: set s (5 :: I "freq")
> In the expression: [set s (3 :: I "amp"), set s (5 :: I
"freq")]
> In an equation for ‘it’:
> it = [set s (3 :: I "amp"), set s (5 :: I "freq")]
> >
>
>
> On Wed, Jul 4, 2018 at 11:50 AM <amindfv(a)gmail.com> wrote:
>
>> The approach I'd use might be a little different. Vivid offers a
"toI"
>> function which takes any number and converts it to an "I".
>>
>> So for example:
>>
>> ```
>> myNums = [1..10] :: [Double]
>>
>> sd0 = undefined :: SynthDef '["freq"]
>> sd1 = undefined :: SynthDef '["amp"]
>>
>> main = do
>> s0 <- synth sd0
>> s1 <- synth sd1
>> forM_ myNums $ \n -> do
>> set s0 (toI n :: I "freq")
>> set s1 (toI n :: I "amp")
>> ```
>>
>> Also: "toI" works on any numeric type (any "Real n"), and
"I" itself is
>> a numeric type. So you can always write:
>>
>> x = 5 :: I "freq"
>> y = toI x :: I "amp"
>>
>> Tom
>>
>>
>> El 4 jul 2018, a las 08:30, Jeffrey Brown <jeffbrown.the(a)gmail.com>
>> escribió:
>>
>> Composers reuse melodic material across different instruments. I would
>> like to do that in Vivid. I would keep a sequence of values and send it
>> sometimes to one parameter of one synth, sometimes to a different parameter
>> of a different synth.
>>
>> To do that I would have to coerce those numbers to values of type `I a`,
>> where the string `a` is known only at runtime. I tried to write a function
>> to do that:
>>
>> import GHC.TypeLits
>> toIOf :: (Real n, GHC.TypeLits.KnownSymbol a) => String -> n -> I a
>> toIOf "freq" n = toI n :: I "freq"
>> toIOf "amp" n = toI n :: I "amp"
>>
>> but it won't compile, because the outputs of `toIOf "freq"` and
`toIOf
>> "amp"` have different types.
>>
>> Is this possible?
>>
>> --
>> Jeff Brown | Jeffrey Benjamin Brown
>> Website <https://msu.edu/~brown202/> | Facebook
>> <https://www.facebook.com/mejeff.younotjeff> | LinkedIn
>> <https://www.linkedin.com/in/jeffreybenjaminbrown>(spammy, so I often
>> miss messages here) | Github
>> <https://github.com/jeffreybenjaminbrown>
>>
>> _______________________________________________
>> Livecode mailing list -- livecode(a)we.lurk.org
>> To unsubscribe send an email to livecode-leave(a)we.lurk.org
>>
>> _______________________________________________
>> Livecode mailing list -- livecode(a)we.lurk.org
>> To unsubscribe send an email to livecode-leave(a)we.lurk.org
>>
>
>
> --
> Jeff Brown | Jeffrey Benjamin Brown
> Website <https://msu.edu/~brown202/> | Facebook
> <https://www.facebook.com/mejeff.younotjeff> | LinkedIn
> <https://www.linkedin.com/in/jeffreybenjaminbrown>(spammy, so I often
> miss messages here) | Github
> <https://github.com/jeffreybenjaminbrown>
>
--
Jeff Brown | Jeffrey Benjamin Brown
Website <https://msu.edu/~brown202/> | Facebook
<https://www.facebook.com/mejeff.younotjeff> | LinkedIn
<https://www.linkedin.com/in/jeffreybenjaminbrown>(spammy, so I often
miss messages here) | Github <https://github.com/jeffreybenjaminbrown>
_______________________________________________
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To unsubscribe send an email to livecode-leave(a)we.lurk.org
_______________________________________________
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To unsubscribe send an email to livecode-leave(a)we.lurk.org
--
Jeff Brown | Jeffrey Benjamin Brown
Website <https://msu.edu/~brown202/> | Facebook
<https://www.facebook.com/mejeff.younotjeff> | LinkedIn
<https://www.linkedin.com/in/jeffreybenjaminbrown>(spammy, so I often miss
messages here) | Github <https://github.com/jeffreybenjaminbrown>
7:01 a.m.
Whoops, that's a not-very-nice error message saying it can't set the
"foobar" property of the synth because it doesn't have that property. If you
remove that line it'll work.
Tom
El 6 jul 2018, a las 21:20, Jeffrey Brown
<jeffbrown.the(a)gmail.com> escribió:
> no maximum
Nice!
> Here's how I might
After half an hour of study I haven't figured out how to evaluate that.
> :{
*Main|
*Main| main = do
*Main| s <- synth boop ()
*Main|
*Main| -- Randomly pick one from the list:
*Main| set' <- pick ( [ \n -> set s (toI n :: I "freq")
*Main| , \n -> set s (toI n :: I "amp")
*Main| , \n -> set s (toI n :: I "foobar")
*Main| ] -- :: [(Real n, VividAction m) => n -> m ()]
*Main| )
*Main| set' 35
*Main| :}
<interactive>:208:26: error:
• Could not deduce: Elem "foobar" '[] arising from a use of ‘set’
from the context: (MonadRandom m, VividAction m)
bound by the inferred type of
main :: (MonadRandom m, VividAction m) => m ()
at <interactive>:(202,1)-(211,9)
• In the expression: set s (toI n :: I "foobar")
In the expression: \ n -> set s (toI n :: I "foobar")
In the first argument of ‘pick’, namely
‘([\ n -> set s (toI n :: I "freq"),
\ n -> set s (toI n :: I "amp"),
\ n -> set s (toI n :: I "foobar")])’
> On Fri, Jul 6, 2018 at 2:28 PM <amindfv(a)gmail.com> wrote:
> Interesting solution! Here's how I might solve it (wanting to set a random
parameter of a synth that's playing):
>
> s <- synth foo ()
>
> -- Randomly pick one from the list:
> set' <- pick [
> \n -> set s (toI n :: I "freq")
> , \n -> set s (toI n :: I "amp")
> , \n -> set s (toI n :: I "foobar")
> ]
>
> set' 35
>
> (You can eliminate the "\n ->" too but thought I'd show the more
general case)
>
> To answer your specific questions:
> - Yes, it's definitely intentional that Vivid only lets you set parameters the
synth has. If you really need to get around it I've built in a few escape hatches
(which I can describe), but I've used Vivid nearly every day for a few years now and
haven't needed it so far.
>
> - There's no maximum to the number of arguments set' could have. In the
worst case (thousands of them?) it could slow down your compilation, but it shouldn't
slow down runtime at all.
>
> Tom
>
>> El 5 jul 2018, a las 00:51, Jeffrey Brown <jeffbrown.the(a)gmail.com>
escribió:
>>
>> It works!
>>
>> set' :: (Subset '["freq","amp"] sdArgs, Real n,
VividAction m)
>> => String -> Node sdArgs -> n -> m ()
>> set' "freq" s n = set s (toI n :: I "freq")
>> set' "amp" s n = set s (toI n :: I "amp")
>>
>> This has a property that, depending on your point of view, you could call a
disadvantage or a feature: `set'` can only send messages to synths (`Node`s) for which
"freq" and "amp" are both valid parameters. If you wanted to use it
with a lot of unique synths, and their parameters have unique names, then you would have
to make every synth recognize all the parameters of all the others. (Those extra
parameters could be no-ops, part of the type signature but unused in the definition.)
>>
>> I'm in kind of a weird place, fighting with Vivid's brilliant type
safety.
>>
>> Is there a theoretical maximum to the number of parameter names `set'` could
be defined for? I tried 33 and it compiled.
>>
>>
>>> On Wed, Jul 4, 2018 at 9:31 PM Jeffrey Brown <jeffbrown.the(a)gmail.com>
wrote:
>>> Thanks, Claude! I'm working on moving your example into the Vivid
context.
>>>
>>> Tom, indeed, that would be simpler! I wanted to use `toI`. But I don't
see how to do that without hard-coding every choice of which parameter to send a message
to.
>>>
>>> For instance, suppose you've got a list of parameter names
`["freq","amp" ..]` from which you want the code to choose a parameter
`p` randomly every cycle, and set it to the value `x`. You can't write `set s (x :: I
p)`, because the `p` in `I p` is a type-level variable rather than an ordinary one.
>>>
>>> I considered keeping a list of functions `[setFreq, setAmp ..]` instead of a
list of parameter names, but I haven't found how to represent such a list:
>>> .
>>> > :set -XDataKinds
>>> > :set -XRankNTypes
>>> > s <- synth boop ()
>>> > [set s (3::I "amp"), set s (5::I "freq")]
>>>
>>> <interactive>:194:22: error:
>>> • Could not deduce: Elem "freq" '[] arising from a use
of ‘set’
>>> from the context: VividAction m
>>> bound by the inferred type of it :: VividAction m => [m ()]
>>> at <interactive>:194:1-41
>>> • In the expression: set s (5 :: I "freq")
>>> In the expression: [set s (3 :: I "amp"), set s (5 :: I
"freq")]
>>> In an equation for ‘it’:
>>> it = [set s (3 :: I "amp"), set s (5 :: I
"freq")]
>>> >
>>>
>>>
>>>> On Wed, Jul 4, 2018 at 11:50 AM <amindfv(a)gmail.com> wrote:
>>>> The approach I'd use might be a little different. Vivid offers a
"toI" function which takes any number and converts it to an "I".
>>>>
>>>> So for example:
>>>>
>>>> ```
>>>> myNums = [1..10] :: [Double]
>>>>
>>>> sd0 = undefined :: SynthDef '["freq"]
>>>> sd1 = undefined :: SynthDef '["amp"]
>>>>
>>>> main = do
>>>> s0 <- synth sd0
>>>> s1 <- synth sd1
>>>> forM_ myNums $ \n -> do
>>>> set s0 (toI n :: I "freq")
>>>> set s1 (toI n :: I "amp")
>>>> ```
>>>>
>>>> Also: "toI" works on any numeric type (any "Real n"),
and "I" itself is a numeric type. So you can always write:
>>>>
>>>> x = 5 :: I "freq"
>>>> y = toI x :: I "amp"
>>>>
>>>> Tom
>>>>
>>>>
>>>>> El 4 jul 2018, a las 08:30, Jeffrey Brown
<jeffbrown.the(a)gmail.com> escribió:
>>>>>
>>>>> Composers reuse melodic material across different instruments. I
would like to do that in Vivid. I would keep a sequence of values and send it sometimes to
one parameter of one synth, sometimes to a different parameter of a different synth.
>>>>>
>>>>> To do that I would have to coerce those numbers to values of type `I
a`, where the string `a` is known only at runtime. I tried to write a function to do
that:
>>>>>
>>>>> import GHC.TypeLits
>>>>> toIOf :: (Real n, GHC.TypeLits.KnownSymbol a) => String ->
n -> I a
>>>>> toIOf "freq" n = toI n :: I "freq"
>>>>> toIOf "amp" n = toI n :: I "amp"
>>>>>
>>>>> but it won't compile, because the outputs of `toIOf
"freq"` and `toIOf "amp"` have different types.
>>>>>
>>>>> Is this possible?
>>>>>
>>>>> --
>>>>> Jeff Brown | Jeffrey Benjamin Brown
>>>>> Website | Facebook | LinkedIn(spammy, so I often miss
messages here) | Github
>>>>> _______________________________________________
>>>>> Livecode mailing list -- livecode(a)we.lurk.org
>>>>> To unsubscribe send an email to livecode-leave(a)we.lurk.org
>>>> _______________________________________________
>>>> Livecode mailing list -- livecode(a)we.lurk.org
>>>> To unsubscribe send an email to livecode-leave(a)we.lurk.org
>>>
>>>
>>> --
>>> Jeff Brown | Jeffrey Benjamin Brown
>>> Website | Facebook | LinkedIn(spammy, so I often miss messages here)
| Github
>>
>>
>> --
>> Jeff Brown | Jeffrey Benjamin Brown
>> Website | Facebook | LinkedIn(spammy, so I often miss messages here) |
Github
>> _______________________________________________
>> Livecode mailing list -- livecode(a)we.lurk.org
>> To unsubscribe send an email to livecode-leave(a)we.lurk.org
> _______________________________________________
> Livecode mailing list -- livecode(a)we.lurk.org
> To unsubscribe send an email to livecode-leave(a)we.lurk.org
--
Jeff Brown | Jeffrey Benjamin Brown
Website | Facebook | LinkedIn(spammy, so I often miss messages here) | Github
_______________________________________________
Livecode mailing list -- livecode(a)we.lurk.org
To unsubscribe send an email to livecode-leave(a)we.lurk.org
7:25 p.m.
Bah! I could have caught that.
It works now! Thanks, Tom!
I don't know if this is of interest to anyone, but I'm building a
collection of examples of how to do simple tasks in Vivid at
https://github.com/JeffreyBenjaminBrown/vivid/tree/jbb/learning
On Sat, Jul 7, 2018 at 12:02 AM <amindfv(a)gmail.com> wrote:
Whoops, that's a not-very-nice error message saying it can't
set the
"foobar" property of the synth because it doesn't have that property. If
you remove that line it'll work.
Tom
El 6 jul 2018, a las 21:20, Jeffrey Brown <jeffbrown.the(a)gmail.com>
escribió:
> no maximum
Nice!
> Here's how I might
After half an hour of study I haven't figured out how to evaluate that.
> :{
*Main|
*Main| main = do
*Main| s <- synth boop ()
*Main|
*Main| -- Randomly pick one from the list:
*Main| set' <- pick ( [ \n -> set s (toI n :: I "freq")
*Main| , \n -> set s (toI n :: I "amp")
*Main| , \n -> set s (toI n :: I "foobar")
*Main| ] -- :: [(Real n, VividAction m) => n -> m ()]
*Main| )
*Main| set' 35
*Main| :}
<interactive>:208:26: error:
• Could not deduce: Elem "foobar" '[] arising from a use of ‘set’
from the context: (MonadRandom m, VividAction m)
bound by the inferred type of
main :: (MonadRandom m, VividAction m) => m ()
at <interactive>:(202,1)-(211,9)
• In the expression: set s (toI n :: I "foobar")
In the expression: \ n -> set s (toI n :: I "foobar")
In the first argument of ‘pick’, namely
‘([\ n -> set s (toI n :: I "freq"),
\ n -> set s (toI n :: I "amp"),
\ n -> set s (toI n :: I "foobar")])’
On Fri, Jul 6, 2018 at 2:28 PM <amindfv(a)gmail.com> wrote:
> Interesting solution! Here's how I might solve it (wanting to set a
> random parameter of a synth that's playing):
>
> s <- synth foo ()
>
> -- Randomly pick one from the list:
> set' <- pick [
> \n -> set s (toI n :: I "freq")
> , \n -> set s (toI n :: I "amp")
> , \n -> set s (toI n :: I "foobar")
> ]
>
> set' 35
>
> (You can eliminate the "\n ->" too but thought I'd show the more
general
> case)
>
> To answer your specific questions:
> - Yes, it's definitely intentional that Vivid only lets you set
> parameters the synth has. If you really need to get around it I've built in
> a few escape hatches (which I can describe), but I've used Vivid nearly
> every day for a few years now and haven't needed it so far.
>
> - There's no maximum to the number of arguments set' could have. In the
> worst case (thousands of them?) it could slow down your compilation, but it
> shouldn't slow down runtime at all.
>
> Tom
>
> El 5 jul 2018, a las 00:51, Jeffrey Brown <jeffbrown.the(a)gmail.com>
> escribió:
>
> It works!
>
> set' :: (Subset '["freq","amp"] sdArgs, Real n,
VividAction m)
> => String -> Node sdArgs -> n -> m ()
> set' "freq" s n = set s (toI n :: I "freq")
> set' "amp" s n = set s (toI n :: I "amp")
>
> This has a property that, depending on your point of view, you could call
> a disadvantage or a feature: `set'` can only send messages to synths
> (`Node`s) for which "freq" and "amp" are both valid parameters.
If you
> wanted to use it with a lot of unique synths, and their parameters have
> unique names, then you would have to make every synth recognize all the
> parameters of all the others. (Those extra parameters could be no-ops, part
> of the type signature but unused in the definition.)
>
> I'm in kind of a weird place, fighting with Vivid's brilliant type safety.
>
> Is there a theoretical maximum to the number of parameter names `set'`
> could be defined for? I tried 33 and it compiled.
>
>
> On Wed, Jul 4, 2018 at 9:31 PM Jeffrey Brown <jeffbrown.the(a)gmail.com>
> wrote:
>
>> Thanks, Claude! I'm working on moving your example into the Vivid
>> context.
>>
>> Tom, indeed, that would be simpler! I wanted to use `toI`. But I don't
>> see how to do that without hard-coding every choice of which parameter to
>> send a message to.
>>
>> For instance, suppose you've got a list of parameter names
>> `["freq","amp" ..]` from which you want the code to choose a
parameter `p`
>> randomly every cycle, and set it to the value `x`. You can't write `set s
>> (x :: I p)`, because the `p` in `I p` is a type-level variable rather than
>> an ordinary one.
>>
>> I considered keeping a list of functions `[setFreq, setAmp ..]` instead
>> of a list of parameter names, but I haven't found how to represent such a
>> list:
>> .
>> > :set -XDataKinds
>> > :set -XRankNTypes
>> > s <- synth boop ()
>> > [set s (3::I "amp"), set s (5::I "freq")]
>>
>> <interactive>:194:22: error:
>> • Could not deduce: Elem "freq" '[] arising from a use of
‘set’
>> from the context: VividAction m
>> bound by the inferred type of it :: VividAction m => [m ()]
>> at <interactive>:194:1-41
>> • In the expression: set s (5 :: I "freq")
>> In the expression: [set s (3 :: I "amp"), set s (5 :: I
>> "freq")]
>> In an equation for ‘it’:
>> it = [set s (3 :: I "amp"), set s (5 :: I
"freq")]
>> >
>>
>>
>> On Wed, Jul 4, 2018 at 11:50 AM <amindfv(a)gmail.com> wrote:
>>
>>> The approach I'd use might be a little different. Vivid offers a
"toI"
>>> function which takes any number and converts it to an "I".
>>>
>>> So for example:
>>>
>>> ```
>>> myNums = [1..10] :: [Double]
>>>
>>> sd0 = undefined :: SynthDef '["freq"]
>>> sd1 = undefined :: SynthDef '["amp"]
>>>
>>> main = do
>>> s0 <- synth sd0
>>> s1 <- synth sd1
>>> forM_ myNums $ \n -> do
>>> set s0 (toI n :: I "freq")
>>> set s1 (toI n :: I "amp")
>>> ```
>>>
>>> Also: "toI" works on any numeric type (any "Real n"), and
"I" itself is
>>> a numeric type. So you can always write:
>>>
>>> x = 5 :: I "freq"
>>> y = toI x :: I "amp"
>>>
>>> Tom
>>>
>>>
>>> El 4 jul 2018, a las 08:30, Jeffrey Brown <jeffbrown.the(a)gmail.com>
>>> escribió:
>>>
>>> Composers reuse melodic material across different instruments. I would
>>> like to do that in Vivid. I would keep a sequence of values and send it
>>> sometimes to one parameter of one synth, sometimes to a different parameter
>>> of a different synth.
>>>
>>> To do that I would have to coerce those numbers to values of type `I
>>> a`, where the string `a` is known only at runtime. I tried to write a
>>> function to do that:
>>>
>>> import GHC.TypeLits
>>> toIOf :: (Real n, GHC.TypeLits.KnownSymbol a) => String -> n ->
I a
>>> toIOf "freq" n = toI n :: I "freq"
>>> toIOf "amp" n = toI n :: I "amp"
>>>
>>> but it won't compile, because the outputs of `toIOf "freq"` and
`toIOf
>>> "amp"` have different types.
>>>
>>> Is this possible?
>>>
>>> --
>>> Jeff Brown | Jeffrey Benjamin Brown
>>> Website <https://msu.edu/~brown202/> | Facebook
>>> <https://www.facebook.com/mejeff.younotjeff> | LinkedIn
>>> <https://www.linkedin.com/in/jeffreybenjaminbrown>(spammy, so I often
>>> miss messages here) | Github
>>> <https://github.com/jeffreybenjaminbrown>
>>>
>>> _______________________________________________
>>> Livecode mailing list -- livecode(a)we.lurk.org
>>> To unsubscribe send an email to livecode-leave(a)we.lurk.org
>>>
>>> _______________________________________________
>>> Livecode mailing list -- livecode(a)we.lurk.org
>>> To unsubscribe send an email to livecode-leave(a)we.lurk.org
>>>
>>
>>
>> --
>> Jeff Brown | Jeffrey Benjamin Brown
>> Website <https://msu.edu/~brown202/> | Facebook
>> <https://www.facebook.com/mejeff.younotjeff> | LinkedIn
>> <https://www.linkedin.com/in/jeffreybenjaminbrown>(spammy, so I often
>> miss messages here) | Github
>> <https://github.com/jeffreybenjaminbrown>
>>
>
>
> --
> Jeff Brown | Jeffrey Benjamin Brown
> Website <https://msu.edu/~brown202/> | Facebook
> <https://www.facebook.com/mejeff.younotjeff> | LinkedIn
> <https://www.linkedin.com/in/jeffreybenjaminbrown>(spammy, so I often
> miss messages here) | Github
> <https://github.com/jeffreybenjaminbrown>
>
> _______________________________________________
> Livecode mailing list -- livecode(a)we.lurk.org
> To unsubscribe send an email to livecode-leave(a)we.lurk.org
>
> _______________________________________________
> Livecode mailing list -- livecode(a)we.lurk.org
> To unsubscribe send an email to livecode-leave(a)we.lurk.org
>
--
Jeff Brown | Jeffrey Benjamin Brown
Website <https://msu.edu/~brown202/> | Facebook
<https://www.facebook.com/mejeff.younotjeff> | LinkedIn
<https://www.linkedin.com/in/jeffreybenjaminbrown>(spammy, so I often
miss messages here) | Github <https://github.com/jeffreybenjaminbrown>
_______________________________________________
Livecode mailing list -- livecode(a)we.lurk.org
To unsubscribe send an email to livecode-leave(a)we.lurk.org
_______________________________________________
Livecode mailing list -- livecode(a)we.lurk.org
To unsubscribe send an email to livecode-leave(a)we.lurk.org
--
Jeff Brown | Jeffrey Benjamin Brown
Website <https://msu.edu/~brown202/> | Facebook
<https://www.facebook.com/mejeff.younotjeff> | LinkedIn
<https://www.linkedin.com/in/jeffreybenjaminbrown>(spammy, so I often miss
messages here) | Github <https://github.com/jeffreybenjaminbrown>
7:52 p.m.
Awesome, thanks Jeffrey! I'm also slowly backfilling vivid-synth.com with an FAQ, with
answers I've sent via email to people (including you, Jeffrey) who've emailed with
questions.
It's a large system to write docs for, so I'm sort of lazily-evaluating them. To
force evaluation of some documentation, email and ask a question!
Tom
El 7 jul 2018, a las 13:25, Jeffrey Brown
<jeffbrown.the(a)gmail.com> escribió:
Bah! I could have caught that.
It works now! Thanks, Tom!
I don't know if this is of interest to anyone, but I'm building a collection of
examples of how to do simple tasks in Vivid at
https://github.com/JeffreyBenjaminBrown/vivid/tree/jbb/learning
> On Sat, Jul 7, 2018 at 12:02 AM <amindfv(a)gmail.com> wrote:
> Whoops, that's a not-very-nice error message saying it can't set the
"foobar" property of the synth because it doesn't have that property. If you
remove that line it'll work.
>
> Tom
>
>
>> El 6 jul 2018, a las 21:20, Jeffrey Brown <jeffbrown.the(a)gmail.com>
escribió:
>>
>> > no maximum
>>
>> Nice!
>>
>> > Here's how I might
>>
>> After half an hour of study I haven't figured out how to evaluate that.
>>
>> > :{
>> *Main|
>> *Main| main = do
>> *Main| s <- synth boop ()
>> *Main|
>> *Main| -- Randomly pick one from the list:
>> *Main| set' <- pick ( [ \n -> set s (toI n :: I
"freq")
>> *Main| , \n -> set s (toI n :: I "amp")
>> *Main| , \n -> set s (toI n :: I "foobar")
>> *Main| ] -- :: [(Real n, VividAction m) => n -> m ()]
>> *Main| )
>> *Main| set' 35
>> *Main| :}
>>
>> <interactive>:208:26: error:
>> • Could not deduce: Elem "foobar" '[] arising from a use of
‘set’
>> from the context: (MonadRandom m, VividAction m)
>> bound by the inferred type of
>> main :: (MonadRandom m, VividAction m) => m ()
>> at <interactive>:(202,1)-(211,9)
>> • In the expression: set s (toI n :: I "foobar")
>> In the expression: \ n -> set s (toI n :: I "foobar")
>> In the first argument of ‘pick’, namely
>> ‘([\ n -> set s (toI n :: I "freq"),
>> \ n -> set s (toI n :: I "amp"),
>> \ n -> set s (toI n :: I "foobar")])’
>>
>>
>>> On Fri, Jul 6, 2018 at 2:28 PM <amindfv(a)gmail.com> wrote:
>>> Interesting solution! Here's how I might solve it (wanting to set a
random parameter of a synth that's playing):
>>>
>>> s <- synth foo ()
>>>
>>> -- Randomly pick one from the list:
>>> set' <- pick [
>>> \n -> set s (toI n :: I "freq")
>>> , \n -> set s (toI n :: I "amp")
>>> , \n -> set s (toI n :: I "foobar")
>>> ]
>>>
>>> set' 35
>>>
>>> (You can eliminate the "\n ->" too but thought I'd show the
more general case)
>>>
>>> To answer your specific questions:
>>> - Yes, it's definitely intentional that Vivid only lets you set
parameters the synth has. If you really need to get around it I've built in a few
escape hatches (which I can describe), but I've used Vivid nearly every day for a few
years now and haven't needed it so far.
>>>
>>> - There's no maximum to the number of arguments set' could have. In
the worst case (thousands of them?) it could slow down your compilation, but it
shouldn't slow down runtime at all.
>>>
>>> Tom
>>>
>>>> El 5 jul 2018, a las 00:51, Jeffrey Brown <jeffbrown.the(a)gmail.com>
escribió:
>>>>
>>>> It works!
>>>>
>>>> set' :: (Subset '["freq","amp"] sdArgs,
Real n, VividAction m)
>>>> => String -> Node sdArgs -> n -> m ()
>>>> set' "freq" s n = set s (toI n :: I "freq")
>>>> set' "amp" s n = set s (toI n :: I "amp")
>>>>
>>>> This has a property that, depending on your point of view, you could call
a disadvantage or a feature: `set'` can only send messages to synths (`Node`s) for
which "freq" and "amp" are both valid parameters. If you wanted to use
it with a lot of unique synths, and their parameters have unique names, then you would
have to make every synth recognize all the parameters of all the others. (Those extra
parameters could be no-ops, part of the type signature but unused in the definition.)
>>>>
>>>> I'm in kind of a weird place, fighting with Vivid's brilliant
type safety.
>>>>
>>>> Is there a theoretical maximum to the number of parameter names
`set'` could be defined for? I tried 33 and it compiled.
>>>>
>>>>
>>>>> On Wed, Jul 4, 2018 at 9:31 PM Jeffrey Brown
<jeffbrown.the(a)gmail.com> wrote:
>>>>> Thanks, Claude! I'm working on moving your example into the Vivid
context.
>>>>>
>>>>> Tom, indeed, that would be simpler! I wanted to use `toI`. But I
don't see how to do that without hard-coding every choice of which parameter to send a
message to.
>>>>>
>>>>> For instance, suppose you've got a list of parameter names
`["freq","amp" ..]` from which you want the code to choose a parameter
`p` randomly every cycle, and set it to the value `x`. You can't write `set s (x :: I
p)`, because the `p` in `I p` is a type-level variable rather than an ordinary one.
>>>>>
>>>>> I considered keeping a list of functions `[setFreq, setAmp ..]`
instead of a list of parameter names, but I haven't found how to represent such a
list:
>>>>> .
>>>>> > :set -XDataKinds
>>>>> > :set -XRankNTypes
>>>>> > s <- synth boop ()
>>>>> > [set s (3::I "amp"), set s (5::I
"freq")]
>>>>>
>>>>> <interactive>:194:22: error:
>>>>> • Could not deduce: Elem "freq" '[] arising
from a use of ‘set’
>>>>> from the context: VividAction m
>>>>> bound by the inferred type of it :: VividAction m =>
[m ()]
>>>>> at <interactive>:194:1-41
>>>>> • In the expression: set s (5 :: I "freq")
>>>>> In the expression: [set s (3 :: I "amp"), set s
(5 :: I "freq")]
>>>>> In an equation for ‘it’:
>>>>> it = [set s (3 :: I "amp"), set s (5 :: I
"freq")]
>>>>> >
>>>>>
>>>>>
>>>>>> On Wed, Jul 4, 2018 at 11:50 AM <amindfv(a)gmail.com> wrote:
>>>>>> The approach I'd use might be a little different. Vivid
offers a "toI" function which takes any number and converts it to an
"I".
>>>>>>
>>>>>> So for example:
>>>>>>
>>>>>> ```
>>>>>> myNums = [1..10] :: [Double]
>>>>>>
>>>>>> sd0 = undefined :: SynthDef '["freq"]
>>>>>> sd1 = undefined :: SynthDef '["amp"]
>>>>>>
>>>>>> main = do
>>>>>> s0 <- synth sd0
>>>>>> s1 <- synth sd1
>>>>>> forM_ myNums $ \n -> do
>>>>>> set s0 (toI n :: I "freq")
>>>>>> set s1 (toI n :: I "amp")
>>>>>> ```
>>>>>>
>>>>>> Also: "toI" works on any numeric type (any "Real
n"), and "I" itself is a numeric type. So you can always write:
>>>>>>
>>>>>> x = 5 :: I "freq"
>>>>>> y = toI x :: I "amp"
>>>>>>
>>>>>> Tom
>>>>>>
>>>>>>
>>>>>>> El 4 jul 2018, a las 08:30, Jeffrey Brown
<jeffbrown.the(a)gmail.com> escribió:
>>>>>>>
>>>>>>> Composers reuse melodic material across different
instruments. I would like to do that in Vivid. I would keep a sequence of values and send
it sometimes to one parameter of one synth, sometimes to a different parameter of a
different synth.
>>>>>>>
>>>>>>> To do that I would have to coerce those numbers to values of
type `I a`, where the string `a` is known only at runtime. I tried to write a function to
do that:
>>>>>>>
>>>>>>> import GHC.TypeLits
>>>>>>> toIOf :: (Real n, GHC.TypeLits.KnownSymbol a) =>
String -> n -> I a
>>>>>>> toIOf "freq" n = toI n :: I "freq"
>>>>>>> toIOf "amp" n = toI n :: I "amp"
>>>>>>>
>>>>>>> but it won't compile, because the outputs of `toIOf
"freq"` and `toIOf "amp"` have different types.
>>>>>>>
>>>>>>> Is this possible?
>>>>>>>
>>>>>>> --
>>>>>>> Jeff Brown | Jeffrey Benjamin Brown
>>>>>>> Website | Facebook | LinkedIn(spammy, so I often miss
messages here) | Github
>>>>>>> _______________________________________________
>>>>>>> Livecode mailing list -- livecode(a)we.lurk.org
>>>>>>> To unsubscribe send an email to livecode-leave(a)we.lurk.org
>>>>>> _______________________________________________
>>>>>> Livecode mailing list -- livecode(a)we.lurk.org
>>>>>> To unsubscribe send an email to livecode-leave(a)we.lurk.org
>>>>>
>>>>>
>>>>> --
>>>>> Jeff Brown | Jeffrey Benjamin Brown
>>>>> Website | Facebook | LinkedIn(spammy, so I often miss
messages here) | Github
>>>>
>>>>
>>>> --
>>>> Jeff Brown | Jeffrey Benjamin Brown
>>>> Website | Facebook | LinkedIn(spammy, so I often miss messages
here) | Github
>>>> _______________________________________________
>>>> Livecode mailing list -- livecode(a)we.lurk.org
>>>> To unsubscribe send an email to livecode-leave(a)we.lurk.org
>>> _______________________________________________
>>> Livecode mailing list -- livecode(a)we.lurk.org
>>> To unsubscribe send an email to livecode-leave(a)we.lurk.org
>>
>>
>> --
>> Jeff Brown | Jeffrey Benjamin Brown
>> Website | Facebook | LinkedIn(spammy, so I often miss messages here) |
Github
>> _______________________________________________
>> Livecode mailing list -- livecode(a)we.lurk.org
>> To unsubscribe send an email to livecode-leave(a)we.lurk.org
> _______________________________________________
> Livecode mailing list -- livecode(a)we.lurk.org
> To unsubscribe send an email to livecode-leave(a)we.lurk.org
--
Jeff Brown | Jeffrey Benjamin Brown
Website | Facebook | LinkedIn(spammy, so I often miss messages here) | Github
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participants (3)
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amindfv＠gmail.com -
Claude Heiland-Allen -
Jeffrey Brown