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add midichan + docs

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This commit is contained in:
Felix Roos 2023-02-25 12:23:01 +01:00
parent 5de6643604
commit 886f8449fd
2 changed files with 36 additions and 7 deletions
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18
packages/midi/midi.mjs
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@ -64,7 +64,7 @@ function getDevice(output, outputs) {
} }
// Pattern.prototype.midi = function (output: string | number, channel = 1) { // Pattern.prototype.midi = function (output: string | number, channel = 1) {
Pattern.prototype.midi = function (output, channel = 1) { Pattern.prototype.midi = function (output) {
if (!supportsMidi()) { if (!supportsMidi()) {
throw new Error(`🎹 WebMidi is not enabled. Supported Browsers: https://caniuse.com/?search=webmidi`); throw new Error(`🎹 WebMidi is not enabled. Supported Browsers: https://caniuse.com/?search=webmidi`);
} }
@ -109,21 +109,27 @@ Pattern.prototype.midi = function (output, channel = 1) {
time = time * 1000 + timingOffset; time = time * 1000 + timingOffset;
// destructure value // destructure value
const { note, nrpnn, nrpv, ccn, ccv } = hap.value; const { note, nrpnn, nrpv, ccn, ccv, midichan = 1 } = hap.value;
const velocity = hap.context?.velocity ?? 0.9; // TODO: refactor velocity const velocity = hap.context?.velocity ?? 0.9; // TODO: refactor velocity
const duration = hap.duration.valueOf() * 1000 - 5; const duration = hap.duration.valueOf() * 1000 - 5;
if (note) { if (note) {
const midiNumber = toMidi(note); const midiNumber = toMidi(note);
console.log('midi number', midiNumber); device.playNote(midiNumber, midichan, {
device.playNote(midiNumber, channel, {
time, time,
duration, duration,
attack: velocity, attack: velocity,
}); });
} }
if (ccn && ccv) { if (ccv && ccn) {
device.sendControlChange(ccn, ccv, channel, { time }); if (typeof ccv !== 'number' || ccv < 0 || ccv > 1) {
throw new Error('expected ccv to be a number between 0 and 1');
}
if (!['string', 'number'].includes(typeof ccn)) {
throw new Error('expected ccn to be a number or a string');
}
const scaled = Math.round(ccv * 127);
device.sendControlChange(ccn, scaled, midichan, { time });
} }
}); });
}; };

25
website/src/pages/learn/input-output.mdx
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@ -22,12 +22,35 @@ If no outputName is given, it uses the first midi output it finds.
<MiniRepl <MiniRepl
client:idle client:idle
tune={`stack("<C^7 A7 Dm7 G7>".voicings('lefthand'), "<C3 A2 D3 G2>") tune={`stack("<C^7 A7 Dm7 G7>".voicings('lefthand'), "<C3 A2 D3 G2>").note()
.midi()`} .midi()`}
/> />
In the console, you will see a log of the available MIDI devices as soon as you run the code, e.g. `Midi connected! Using "Midi Through Port-0".` In the console, you will see a log of the available MIDI devices as soon as you run the code, e.g. `Midi connected! Using "Midi Through Port-0".`
## midichan(number)
Selects the MIDI channel to use. If not used, `.midi` will use channel 1 by default.
## ccn && ccv
- `ccn` sets the cc number. Depends on your synths midi mapping
- `ccv` sets the cc value. normalized from 0 to 1.
<MiniRepl client:idle tune={`note("c a f e").ccn(74).ccv(sine.slow(4)).midi()`} />
In the above snippet, `ccn` is set to 74, which is the filter cutoff for many synths. `ccv` is controlled by a saw pattern.
Having everything in one pattern, the `ccv` pattern will be aligned to the note pattern, because the structure comes from the left by default.
But you can also control cc messages separately like this:
<MiniRepl
client:idle
tune={`stack(
note("c a f e"),
ccv(sine.segment(16).slow(4)).ccn(74)
).midi()`}
/>
# SuperDirt API # SuperDirt API
In mainline tidal, the actual sound is generated via [SuperDirt](https://github.com/musikinformatik/SuperDirt/), which runs inside SuperCollider. In mainline tidal, the actual sound is generated via [SuperDirt](https://github.com/musikinformatik/SuperDirt/), which runs inside SuperCollider.