120 lines
2.3 KiB
Text
120 lines
2.3 KiB
Text
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#lang scribble/manual
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@(require (for-label racket))
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@title{OffsetOut}
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Write a signal to a bus with sample accurate timing.@section{related}
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Classes/Out, Classes/ReplaceOut, Classes/XOut
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@section{categories}
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UGens>InOut
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@section{description}
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Output signal to a bus, the sample offset within the bus is kept
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exactly; i.e. if the synth is scheduled to be started part way through a
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control cycle, OffsetOut will maintain the correct offset by buffering
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the output and delaying it until the exact time that the synth was
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scheduled for.
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For achieving subsample accuracy see link::Classes/SubsampleOffset::
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@section{note}
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Note that if you have an input to the synth, it will be coming in and
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its normal time, then mixed in your synth, and then delayed with the
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output. So you shouldn't use OffsetOut for effects or gating.
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::
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See the link::Reference/Server-Architecture:: and link::Classes/Bus:: helpfiles for more information on
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buses and how they are used.
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@section{classmethods}
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@section{method}
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ar
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@section{argument}
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bus
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The index of the bus to write out to. The lowest numbers are
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written to the audio hardware.
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@section{argument}
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channelsArray
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An Array of channels or single output to write out. You cannot
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change the size of this once a SynthDef has been built.
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@section{Examples}
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@racketblock[
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(
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SynthDef("help-OffsetOut",
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{ arg out=0, freq=440, dur=0.05;
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var env;
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env = EnvGen.kr(Env.perc(0.01, dur, 0.2), doneAction: Done.freeSelf);
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OffsetOut.ar(out, SinOsc.ar(freq, 0, env))
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}).send(s);
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SynthDef("help-Out",
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{ arg out=0, freq=440, dur=0.05;
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var env;
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env = EnvGen.kr(Env.perc(0.01, dur, 0.2), doneAction: Done.freeSelf);
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//compare to Out:
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Out.ar(out, SinOsc.ar(freq, 0, env))
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}).send(s);
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)
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// these are in sync
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(
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Routine({
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loop {
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s.sendBundle(0.2, ["/s_new", "help-OffsetOut", -1]);
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0.01.wait;
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}
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}).play;
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)
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// these are less reliably in sync and are placed at multiples of blocksize.
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(
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Routine({
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loop {
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s.sendBundle(0.2, ["/s_new", "help-Out", -1]);
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0.01.wait;
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}
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}).play;
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)
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SynthDef("trig1",{
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var gate,tone;
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gate = Trig1.ar(1.0,t);
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tone = In.ar(10,1); // tone comes in normally
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// but is then delayed when by the OffsetOut
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OffsetOut.ar(0,
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tone * EnvGen.ar(
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Env([0,0.1,0.1,0],[0.01,1.0,0.01],[-4,4],2),
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gate,doneAction: Done.freeSelf
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)
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)
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})
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::
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]
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