Re: [chuck-users] function for creating 8 bit waveforms from expressions

hey, i found a link to the paper, i hope you enjoy it: http://cilab.math.upatras.gr/mikeagn/sites/cilab.math.upatras.gr.mikeagn/fil... 2013/12/28, Michael Heuer :

Hello Ronni,

Might you have a link to the paper you are referring to? Something is lost to me in the specification of the algorithm.

I am reminded of this

http://createdigitalmusic.com/2011/10/entire-musical-compositions-made-from-...

http://countercomplex.blogspot.com/2011/10/algorithmic-symphonies-from-one-l...

http://countercomplex.blogspot.com/2011/10/some-deep-analysis-of-one-line-mu...

Cheers,

michael

On Fri, Dec 27, 2013 at 1:46 AM, Ronni Montoya wrote:

...

Hi list, i been reading a paper that talks about an approach for generating sound that uses functions to directly shape waveforms. The function receives "expresions" as argument and it generates different kind of 8 bit waveforms from the expressions.

An expression can look like this:

f(t) = t * ( t >> 8 * ( t >>15 | t >> 8) & 20 | ( t >>19) * 5 >> t | t >> 3))

The paper describes the algorithm in this way:

algorithm 1 : Construction of an 8-bit waveform of 8000Hz sample rate:

The function has 2 inputs :

Input 1) a functional expresion f(t) Input 2 ) time durations in seconds (d) Output: the waveform of an audio signal with seconds duration

for t = 1 to d8000 do if f(t) ==NaN then q(t) <-- 0 else q(t) <-- mod(f(t)), 256) end if s(t) <-- 2 q(t)/255 - 1 end for

If its possible to implement this approach for generating sound in chuck??

cheers

R. _______________________________________________ chuck-users mailing list chuck-users@lists.cs.princeton.edu https://lists.cs.princeton.edu/mailman/listinfo/chuck-users

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