2.midiratio
(
SynthDef(\pad, {
	arg freq = 440, gate = 1;
	var env, rel, sig, sig2, detuner1, detuner2;
	rel = \rel.kr(1);
	env = EnvGen.ar(Env.asr(1.2, 0.5, 3), gate, doneAction: Done.freeSelf);
	// this is the key part: several oscillators in UNISON, here using a noise ugen
	sig = LFSaw.ar((-5..5).collect({|i| freq + i}), LFTri.kr(0.05).range(1, 2));
	sig = Splay.ar(sig, 0.1);
	sig = RLPF.ar(sig, [3000, 2000, 1250, 600] * LFNoise2.kr(1).range(0.5, 1.2), 0.4);
	sig = Splay.ar(sig, 0.1);
	sig = HPF.ar(sig, 150);
	sig = sig * env;
	sig = sig * \amp.kr(1);
	Out.ar(\out.kr(0), Limiter.ar(sig));
}).add;
)

(
MIDIClient.init;
MIDIIn.connectAll;

MIDIFunc.trace(true);
)

(
~synths = Array.fill(127, nil);
MIDIdef.noteOn(\on, {
    arg val, num, chan,src;
    if(~synths[num] == nil, {  // To be absolutely save
        ~synths[num] = Synth(\pad, [
			\amp, 0.5,
            \freq, num.midicps,
            \harm, exprand(4,20)]);
    });
});

MIDIdef.noteOff(\off, {
    arg val, num, chan,src;
    if(~synths[num] != nil, {  // To be absolutely safe
        ~synths[num].set(\gate, 0);
        ~synths[num] = nil;    // Remove the reference
    });
});
)

(-10..10)