[chuck-users] Granular synthesizer - Chuck language

[Wolfgang Gil]

Michael, thanks for your answer.
Do you still live in Brooklyn? Maybe we can get together for a coffee...
I like 3 blocks away from the Prospect Park station (Q, B, S trains)

i'll definitely check the code you send me.
looking forward

2010/10/25 mike clemow <michaelclemow at gmail.com>

> Hi Wolfgang,
>
> I really like your instrument!  I had to change a few things to get it
> running: the file name strings ended in ".ch" rather than ".ck", which threw
> me for a minute.  Also, there are obviously somethings that are
> un-implemented (e.g. reverb in Global, etc.)  But I really like the use of
> the interface to spawn grain-producing shreds.  It gives you some ad hoc
> control over the grain cloud.
>
> One bit of feedback I will give you is that the most inefficient part of
> your granular implementation is the sample-level intervention in the Grain
> class.  The way you're doing it at each sample, the chuck language has to do
> a bunch of math to calculate the gain for the next sample in order to do
> your enveloping.  This does work, however, there are UGens that will do this
> much more efficiently (as they are written in C).  One of them is Envelope,
> another is ADSR.  These will work more efficiently, however, they have
> drawbacks.  Namely, the amount of work you have to do to use these UGens
> doesn't really yield (no pun intended) much more flexibility in particle
> design.  Envelope style makes a huge difference in the spectral
> characteristics of individual grains.
>
> There is one UGen, however, which I have found to be extremely flexible,
> efficient, and generally under-used: CurveTable.  Attached is a the basis
> (and some simple tests) for a granular synthesis implementation using
> CurveTable as an envelope.  I find this to be quite elegant and useful.  You
> may too.
>
> CurveTable allows you to specify a curve using coefficients to build
> segments of the curve and fills a buffer with those curve segments.  The
> segments are specified by three coefficients each, [ time, amplitude,
> curvature ] and you can have as many segments as you want: [ time,
> amplitude, curvature, time, amplitude, curvature, time, amplitude,
> curvature, time, amplitude, curvature... ]
>
> some documentation:
>
> http://chuck.cs.princeton.edu/doc/examples/special/GenX-CurveTable-test.ck
>
>
> http://www.music.columbia.edu/cmc/Rtcmix/docs/scorefile/maketable.html#curve
>
>
> Anyway, take a look at the attached code and run it / play with it a little
> bit.  I find this to be a much more efficient and flexible way to envelope
> grains in Chuck.  I find that I can get a lot more bang for my buck
> performance-wise.  In this implementation, Chuck only intervenes once per
> grain (to initiate it).  We get to take advantage of a variable control rate
> implementation that the Chuck system affords us and we also get to lean on
> the UGens for the heavy lifting.
>
> That said, I really like the direction you're taking this instrument.  Keep
> it up!
>
> Mike
>
>
>
> 2010/10/23 Wolfgang Gil <wolfgang.gil at gmail.com>
>
>> Hello,
>>
>> I'm working on a granular synthesizer using the language of Chuck (using
>> miniAudicle). I would like to share the code with the desire to receive
>> feedback from you.
>>
>> Please take a look at it if you like and feel free to modify it, use it,
>> etc. ..
>> I am also looking for an open-source pulse synthesizer and other
>> microsound-based instruments.
>>
>> Thanks, open to collaborate.
>>
>> --
>> Wolfgang Gil
>> http://www.wolfganggil.com
>>
>>
>>
>> --
>> Wolfgang Gil
>> http://www.wolfganggil.com
>>
>> _______________________________________________
>> chuck-users mailing list
>> chuck-users at lists.cs.princeton.edu
>> https://lists.cs.princeton.edu/mailman/listinfo/chuck-users
>>
>>
>
>
> --
> http://michaelclemow.com
> http://semiotech.org
>
>
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>


-- 
Wolfgang Gil
http://www.wolfganggil.com
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