TWIChoose...?

[Martin Vognsen-2]

Hello

I would like the amp of a TGrains to be modulated by something to the  
effect of [0, 1].wchoose([x, y]) at each trigger. What's a smart way  
to do that - can it be done inside a synthdef? I was playing with a  
workaround involving a Dseq([0,1], inf) and then delaying the trigger  
at random with a TRand, but that doesn't seem like such a sexy  
solution. The point is to be able to modulate gradually from only 0's  
(constant silence) to only 1's (every grain is heard), so that you  
can create a rhythm with a random element, where you can control the  
density of the rhythm. Would be nice to be able to control the amount  
of randomness as well, actually, so that with a [0.5, 0.5] weight you  
could modulate from a regular pattern of 10101010101010 etc to  
something very random but with the same average amount of 0's and 1's  
over a stretch of time.

Does anybody have a ugen with this kind of functionality? Or should I  
just forget about doing this inside the synthdef?

This is probably something completely obvious, that I'm overlooking,  
as usual, but I would very much appreciate any pointers.

Thank you!
Martin


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[Nathaniel Virgo-2]

Hi Martin,

I don't know about modulating the amp of the grains, but you can create an appropriate trigger signal like this:

trigger = Impulse.ar(10)*(WhiteNoise.ar.range(0,1)>prob)

the ">" symbol will create a signal that constantly flips between 0 and 1 depending on the probability.  Multiplying by this signal will either cancel out the impulse or let it through.

Your second example can be done with some code like this, which morphs from 101010101010 to a completely random pattern of impulses over 30 seconds:

(
// TURN THE VOLUME DOWN FIRST as it plays raw impulses.
{
    var switch_noise, random_noise, prob, sig1, sig2;
    prob = Line.kr(0,1,30);
    switch_noise = WhiteNoise.ar.range(0,1);
    random_noise = WhiteNoise.ar.range(0,1);
    sig1 = Impulse.ar(5);
    sig2 = Impulse.ar(10)*(random_noise>0.5);
    (sig1*(switch_noise>prob)) + (sig2*(switch_noise<=prob))
}.play
)


Hope this helps

Nathaniel

2008/7/11 Martin Vognsen <gnormaninvest@...>:

Hello

I would like the amp of a TGrains to be modulated by something to the effect of [0, 1].wchoose([x, y]) at each trigger. What's a smart way to do that - can it be done inside a synthdef? I was playing with a workaround involving a Dseq([0,1], inf) and then delaying the trigger at random with a TRand, but that doesn't seem like such a sexy solution. The point is to be able to modulate gradually from only 0's (constant silence) to only 1's (every grain is heard), so that you can create a rhythm with a random element, where you can control the density of the rhythm. Would be nice to be able to control the amount of randomness as well, actually, so that with a [0.5, 0.5] weight you could modulate from a regular pattern of 10101010101010 etc to something very random but with the same average amount of 0's and 1's over a stretch of time.

Does anybody have a ugen with this kind of functionality? Or should I just forget about doing this inside the synthdef?

This is probably something completely obvious, that I'm overlooking, as usual, but I would very much appreciate any pointers.

Thank you!
Martin


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[Julian Rohrhuber]

So you are looking for a CoinGate maybe?

if you want to plug a demand ugen directly into the amp input, you
could try it with Dswitch1 and Dwhite:

Dswitch1([0, 1], Dwhite() > x)

>Hello
>
>I would like the amp of a TGrains to be modulated by something to
>the effect of [0, 1].wchoose([x, y]) at each trigger. What's a smart
>way to do that - can it be done inside a synthdef? I was playing
>with a workaround involving a Dseq([0,1], inf) and then delaying the
>trigger at random with a TRand, but that doesn't seem like such a
>sexy solution. The point is to be able to modulate gradually from
>only 0's (constant silence) to only 1's (every grain is heard), so
>that you can create a rhythm with a random element, where you can
>control the density of the rhythm. Would be nice to be able to
>control the amount of randomness as well, actually, so that with a
>[0.5, 0.5] weight you could modulate from a regular pattern of
>10101010101010 etc to something very random but with the same
>average amount of 0's and 1's over a stretch of time.
>
>Does anybody have a ugen with this kind of functionality? Or should
>I just forget about doing this inside the synthdef?
>
>This is probably something completely obvious, that I'm overlooking,
>as usual, but I would very much appreciate any pointers.
>
>Thank you!
>Martin
>
>
>_______________________________________________
>sc-users mailing list
>
>info (subscribe and unsubscribe):
>http://swiki.hfbk-hamburg.de:8888/MusicTechnology/880
>archive: http://www.listarc.bham.ac.uk/marchives/sc-users/
>search: http://www.listarc.bham.ac.uk/lists/sc-users/search/

--





.

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[Martin Vognsen-2]

Nathaniel, Julian -

Thank you so much for the suggestions. Very useful tricks. I knew  
there had to be elegant solutions.

Martin


Den 11/07/2008 kl. 20.28 skrev Julian Rohrhuber:

> So you are looking for a CoinGate maybe?
>
> if you want to plug a demand ugen directly into the amp input, you  
> could try it with Dswitch1 and Dwhite:
>
> Dswitch1([0, 1], Dwhite() > x)
>
>
>> Hello
>>
>> I would like the amp of a TGrains to be modulated by something to  
>> the effect of [0, 1].wchoose([x, y]) at each trigger. What's a  
>> smart way to do that - can it be done inside a synthdef? I was  
>> playing with a workaround involving a Dseq([0,1], inf) and then  
>> delaying the trigger at random with a TRand, but that doesn't seem  
>> like such a sexy solution. The point is to be able to modulate  
>> gradually from only 0's (constant silence) to only 1's (every  
>> grain is heard), so that you can create a rhythm with a random  
>> element, where you can control the density of the rhythm. Would be  
>> nice to be able to control the amount of randomness as well,  
>> actually, so that with a [0.5, 0.5] weight you could modulate from  
>> a regular pattern of 10101010101010 etc to something very random  
>> but with the same average amount of 0's and 1's over a stretch of  
>> time.
>>
>> Does anybody have a ugen with this kind of functionality? Or  
>> should I just forget about doing this inside the synthdef?
>>
>> This is probably something completely obvious, that I'm  
>> overlooking, as usual, but I would very much appreciate any pointers.
>>
>> Thank you!
>> Martin
>>
>>
>> _______________________________________________
>> sc-users mailing list
>>
>> info (subscribe and unsubscribe): http://swiki.hfbk-hamburg.de: 
>> 8888/MusicTechnology/880
>> archive: http://www.listarc.bham.ac.uk/marchives/sc-users/
>> search: http://www.listarc.bham.ac.uk/lists/sc-users/search/
>
>
> --
>
>
>
>
>
> .
>
> _______________________________________________
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>
> info (subscribe and unsubscribe): http://swiki.hfbk-hamburg.de:8888/ 
> MusicTechnology/880
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