BufGrainI granular synthesis with sound sampled in a buffer and user supplied envelopes

 *ar(trigger, dur, sndbuf, rate, pos, envbuf1, envbuf2, ifac, interp, mul, add) 

trigger - a kr or ar trigger to start a new grain. If ar, grains after the start of the synth are sample accurate.

The following args are polled at grain creation time

dur - size of the grain.

sndbuf - the buffer holding an audio signal

rate - the playback rate of the sampled sound

pos - the playback position for the grain to start with (0 is beginning, 1 is end of file)

envbuf1 - a buffer with a stored signal to be used for the envelope of the grain

envbuf2 - a buffer with a stored signal to be used for the envelope of the grain

ifac - an interpolation factor. interpolates between the two envelopes where 0 is all envbuf1, and 1 is all

envbuf2

interp - the kind of interpolation for the sampled sound in the grain (1 - none, 2 - linear, 4 - cubic)

Examples:

s.boot;

SynthDef(\buf_grain_test, {arg gate = 1, sndbuf, amp = 1, envbuf1, envbuf2;

Out.ar(0,

BufGrainI.ar(Impulse.kr(10), 0.2, sndbuf, MouseX.kr(0.5, 8), PinkNoise.kr.range(0, 1),

envbuf1, envbuf2, MouseY.kr(0, 1), 2,

EnvGen.kr(

Env([0, 1, 0], [1, 1], \sin, 1),

gate,

levelScale: amp,

doneAction: 2)

)

)

}).load(s);

s.sendMsg(\b_allocRead, x = s.bufferAllocator.alloc(1), "sounds/a11wlk01-44_1.aiff");

y = Env([0, 1, 0], [1, 1], \sin).asSignal(1024);

z = Env([0, 1, 0], [1, 1], [10, -10]).asSignal(1024);

s.sendMsg(\b_alloc, b = s.bufferAllocator.alloc(1), 1024, 1, [\b_setn, b, 0, 1024] ++ y)

s.sendMsg(\b_alloc, c = s.bufferAllocator.alloc(1), 1024, 1, [\b_setn, c, 0, 1024] ++ z)

s.sendMsg(\s_new, \buf_grain_test, a=s.nextNodeID, 0, 1, \amp, 0.2, \sndbuf, x, \envbuf1, b, 

\envbuf2, c);

s.sendMsg(\n_set, a, \gate, 0);

s.sendMsg(\b_free, b);

s.sendMsg(\b_free, c);

s.sendMsg(\b_free, x);