STGRANR

sampling stochastic granular processor (in package insts.std)


STGRANR does stochastic granular signal-processing, decomposing an input soundfile or real-time sound source. It's a fairly powerful instrument, with lots of snazzy gen-envelope controls to produce evolving granular textures. To best understand the concepts behind the design of this instrument, see Mara Helmth's papers on the use of these techniques.

It was originally adapted from the older stgran Cmix instrument, also written by Mara.


p-fields: 
/* STGRANR: sampling stochastic granular instrument
 
   p0=start_time
   p1=input start time
   p2=duration
   p3=amplitude
   p4=rate, p5-8 ratevar
   p9-12 duration
   p13-16 location
   p17-20 transposition
   p21 granlayers
   p22 seed
   assumes function table 1 is the amplitude envelope
   function table 2 is the synthesis waveform,
   function table 3 is grain amplitude envelope
*/
Sample scorefile: 
set_option("FULL_DUPLEX_ON")
rtsetparams(44100, 2)
load("STGRANR")
rtinput("AUDIO","MIC",2)

makegen(1, 7, 1000, 1, 950, 1, 50, 0)
makegen(2, 25, 1000, 1)

start = 0.0

    /* p0start, p1inputstt, p2dur, p3amp */
STGRANR(start, 0, 13, 5000, 
/* grain rate, ratevar values (must be positive,
   % until next grain possible displacement): */
.1, 0.0, 0.1, 0.2, 1.0,
/* duration values: */
.1,.1,.1,2, 
/* location values: */
0.0,0.5,1.0,10.0, 
/* pitch values: */
0.0,0.00,0.07,2,
/* granlyrs, seed */
1,1)

SEE ALSO

SGRANR


AUTHOR

Mara Helmuth (mara at meowing dot ccm dot uc dot edu)