Created
July 8, 2018 11:07
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Minimal MPE example for Norns
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Engine_MinimalMPE : CroneEngine { | |
var synths; | |
*new { arg context, doneCallback; | |
^super.new(context, doneCallback); | |
} | |
alloc { | |
synths = Array.newClear(8); | |
SynthDef("mpeSynth", { | |
arg out, freq = 110.0, gate = 1.0, amp = 0.0; | |
var sig; | |
var env = Env.adsr(0.02, 0.1); | |
sig = SinOsc.ar(freq, mul: amp * 0.8 * EnvGen.kr(env, gate, doneAction: Done.freeSelf)); | |
Out.ar(out, sig!2); | |
}).add; | |
this.addCommand("noteOn", "if", { arg msg; | |
var chan = msg[1]; | |
if (synths[chan] != nil) { | |
synths[chan].set(\gate, 0); | |
}; | |
synths[chan] = Synth("mpeSynth", [\out, context.out_b, \freq, msg[2], \gate, 1], target:context.xg); | |
}); | |
this.addCommand("noteOff", "i", { arg msg; | |
var chan = msg[1]; | |
if (synths[chan] != nil) { | |
synths[chan].set(\gate, 0); | |
}; | |
}); | |
this.addCommand("freq", "if", { arg msg; | |
var chan = msg[1]; | |
if (synths[chan] != nil) { | |
synths[chan].set(\freq, msg[2]); | |
}; | |
}); | |
this.addCommand("amp", "if", { arg msg; | |
var chan = msg[1]; | |
if (synths[chan] != nil) { | |
synths[chan].set(\amp, msg[2]); | |
}; | |
}); | |
} | |
} |
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engine.name = "MinimalMPE" | |
local notes = {0,0,0,0,0,0,0,0} | |
function init() | |
end | |
local function getHz(note) | |
return 13.75*2^(note/12) | |
end | |
local function note_on(channel, note, vel) | |
notes[channel] = note | |
engine.noteOn(channel, getHz(note)) | |
end | |
local function note_off(channel, note, vel) | |
engine.noteOff(channel) | |
end | |
local function getChannel(status) | |
return bit32.band(15, status) | |
end | |
local function getEventType(status) | |
return bit32.band(240, status) | |
end | |
local function midi_event(data) | |
local channel = getChannel(data[1]) | |
local eventType = getEventType(data[1]) | |
if eventType == 144 then | |
if data[3] == 0 then | |
note_off(channel, data[2]) | |
else | |
note_on(channel, data[2], data[3]) | |
end | |
elseif eventType == 128 then | |
note_off(channel, data[2]) | |
elseif eventType == 176 then | |
--cc(channel, data1, data2) | |
elseif eventType == 224 then | |
local bend = 24.0 * ((data[3] * 127.0 + data[2] - 8192.0)/8192.0); | |
engine.freq(channel, getHz(notes[channel] + bend)) | |
elseif eventType == 208 then | |
engine.amp(channel, 0.3 * (data[2]/127.0)) | |
end | |
end | |
midi.add = function(dev) | |
print('mpeTest: midi device added', dev.id, dev.name) | |
dev.event = midi_event | |
end |
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