67 lines
1.3 KiB
Text
67 lines
1.3 KiB
Text
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#lang scribble/manual
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@(require (for-label racket))
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@title{Blip}
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Band limited impulse oscillator.@section{related}
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Classes/Impulse
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@section{categories}
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UGens>Generators>Deterministic
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@section{description}
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Band Limited ImPulse generator. All harmonics have equal amplitude.
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This is the equivalent of 'buzz' in emphasis::MusicN:: languages.
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emphasis::Synth-O-Matic:: (1990) had an impulse generator
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called blip, hence that name here rather than 'buzz'.
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It is improved from other implementations in that it will crossfade
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in a control period when the number of harmonics changes,
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so that there are no audible pops. It also eliminates the divide in
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the formula by using a 1/sin table (with special precautions taken for
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1/0). The lookup tables are linearly interpolated for better quality.
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@section{warning}
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This waveform in its raw form could be damaging to your ears at high
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amplitudes or for long periods.
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::
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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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freq
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Frequency in Hertz.
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@section{argument}
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numharm
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Number of harmonics. This may be lowered internally if it would cause aliasing.
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@section{argument}
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mul
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@section{argument}
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add
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@section{Examples}
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@racketblock[
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// modulate frequency
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{ Blip.ar(XLine.kr(20000,200,6),100,0.2) }.play;
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// modulate numharmonics
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{ Blip.ar(200,Line.kr(1,100,20),0.2) }.play;
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::
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]
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