PlayBuf | SuperCollider 3.12.2 Help

Class Methods

PlayBuf.ar(numChannels, bufnum: 0, rate: 1.0, trigger: 1.0, startPos: 0.0, loop: 0.0, doneAction: 0)

PlayBuf.kr(numChannels, bufnum: 0, rate: 1.0, trigger: 1.0, startPos: 0.0, loop: 0.0, doneAction: 0)

Arguments:

numChannels	Number of channels that the buffer will be. This must be a fixed integer. The architecture of the SynthDef cannot change after it is compiled.
bufnum	The index of the buffer to use. NOTE: If you supply a bufnum of a buffer with a differing number of channels than the one specified in this PlayBuf, it will post a warning and output the channels it can.
rate	1.0 is the server's sample rate, 2.0 is one octave up, 0.5 is one octave down -1.0 is backwards normal rate… etc. Interpolation is cubic.
trigger	A trigger causes a jump to the startPos. A trigger occurs when a signal changes from negative value to positive value.
startPos	Sample frame to start playback.
loop	1 means true, 0 means false. This is modulateable.
doneAction	an integer representing an action to be executed when the buffer is finished playing. This can be used to free the enclosing synth, etc. See Done for more detail. `doneAction` is only evaluated if loop is 0.

Examples

In the above example, note how the doneAction: Done.freeSelf causes the synth to free itself when the buffer reaches its end.

Note again that the number of channels must be fixed for the SynthDef. It cannot vary depending on which buffer you use.// loop is true SynthDef(\help_PlayBuf, {| out = 0, bufnum = 0 | Out.ar(out, PlayBuf.ar(1, bufnum, BufRateScale.kr(bufnum), loop: 1.0) ) }).play(s, [\out, 0, \bufnum, b]); // trigger one shot on each pulse SynthDef(\help_PlayBuf, {| out = 0, bufnum = 0 | var trig; trig = Impulse.kr(2.0); Out.ar(out, PlayBuf.ar(1, bufnum, BufRateScale.kr(bufnum), trig, 0, 0) ) }).play(s, [\out, 0, \bufnum, b]); // trigger one shot on each pulse SynthDef(\help_PlayBuf, {| out = 0, bufnum = 0 | var trig; trig = Impulse.kr(XLine.kr(0.1, 100, 30)); Out.ar(out, PlayBuf.ar(1, bufnum, BufRateScale.kr(bufnum), trig, 5000, 0) ) }).play(s, [\out, 0, \bufnum, b]); // mouse control of trigger rate and startpos SynthDef(\help_PlayBuf, { arg out=0, bufnum=0; var trig; trig = Impulse.kr(MouseY.kr(0.5, 200, 1)); Out.ar(out, PlayBuf.ar(1, bufnum, BufRateScale.kr(bufnum), trig, MouseX.kr(0, BufFrames.kr(bufnum)), 1) ) }).play(s, [\out, 0, \bufnum, b]); // accelerating pitch SynthDef(\help_PlayBuf, {| out = 0, bufnum = 0 | var rate; rate = XLine.kr(0.1, 100, 60); Out.ar(out, PlayBuf.ar(1, bufnum, BufRateScale.kr(bufnum)*rate, 1.0, 0.0, 1.0) ) }).play(s, [\out, 0, \bufnum, b]); // sine wave control of playback rate. negative rate plays backwards SynthDef(\help_PlayBuf, {| out = 0, bufnum = 0 | var rate; rate = FSinOsc.kr(XLine.kr(0.2, 8, 30), 0, 3, 0.6); Out.ar(out, PlayBuf.ar(1, bufnum, BufRateScale.kr(bufnum) * rate, 1, 0, 1) ) }).play(s, [\out, 0, \bufnum, b]); // zig zag around sound SynthDef(\help_PlayBuf, {| out = 0, bufnum = 0 | var rate; rate = LFNoise2.kr(XLine.kr(1, 20, 60), 2); Out.ar(out, PlayBuf.ar(1, bufnum, BufRateScale.kr(bufnum) * rate, 1, 0, 1) ) }).play(s, [\out, 0, \bufnum, b]); b.free;

helpfile source: /usr/local/share/SuperCollider/HelpSource/Classes/PlayBuf.schelp
link::Classes/PlayBuf::

PlayBuf : MultiOutUGen : UGen : AbstractFunction : Object

Description

Class Methods

PlayBuf.ar(numChannels, bufnum: 0, rate: 1.0, trigger: 1.0, startPos: 0.0, loop: 0.0, doneAction: 0)

PlayBuf.kr(numChannels, bufnum: 0, rate: 1.0, trigger: 1.0, startPos: 0.0, loop: 0.0, doneAction: 0)

Arguments:

Inherited class methods

Instance Methods

Inherited instance methods

Examples