63 lines
2.1 KiB
Text
63 lines
2.1 KiB
Text
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#lang scribble/manual
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@(require (for-label racket))
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@title{Pattern Guide Cookbook 04: Sending MIDI}
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Sending notes under pattern control to MIDI devices@section{related}
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Tutorials/A-Practical-Guide/PG_Cookbook03_External_Control, Tutorials/A-Practical-Guide/PG_Cookbook05_Using_Samples
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@section{categories}
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Streams-Patterns-Events>A-Practical-Guide
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@section{section}
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Sending MIDI out with Patterns
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Sending MIDI is the job of the link::Classes/MIDIOut:: class and the
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@racketblock[\midi:: event type. A MIDIOut is created to talk to a hardware device; the MIDI channel is provided when an event is played. MIDIOut's ]
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@racketblock[newByName:: makes it easier to identify a device.
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The ]
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@racketblock[\midi:: event type supports the following commands, chosen in the event by the ]
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@racketblock[\midicmd:: key: ]
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@racketblock[\allNotesOff, \bend, \control, \noteOff, \noteOn, \polyTouch, \program, \smpte, \songPtr, \sysex, \touch::. The default is ]
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@racketblock[\noteOn::. When playing a note (noteOn), by default the corresponding noteOff message will be sent after the note's sustain time.
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If you want to synchronize events played by a MIDI device and events played by the SuperCollider server, the MIDIOut object's latency must match the server latency. You can set the latency any time to affect all future events.
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]
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@racketblock[
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MIDIClient.init; // if not already done
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(
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// substitute your own device here
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var mOut = MIDIOut.newByName("FastLane USB", "Port A").latency_(Server.default.latency);
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p = Pbind(
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\type, \midi,
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// this line is optional b/c noteOn is the default
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// just making it explicit here
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\midicmd, \noteOn,
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\midiout, mOut, // must provide the MIDI target here
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\chan, 0,
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// degree is converted to midinote, not just frequency
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\degree, Pwhite(-7, 12, inf),
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\dur, Pwrand([0.25, Pn(0.125, 2)], #[0.8, 0.2], inf),
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\legato, sin(Ptime(inf) * 0.5).linexp(-1, 1, 1/3, 3),
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\amp, Pexprand(0.5, 1.0, inf)
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).play(quant: 1);
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)
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p.stop;
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::
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Previous: link::Tutorials/A-Practical-Guide/PG_Cookbook03_External_Control::
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Next: link::Tutorials/A-Practical-Guide/PG_Cookbook05_Using_Samples::
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]
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