Granulator {
	var <buflen, <inb, <outb, <>posb, <triggerb, <pitchb, <>modb, <buffer, <recorder, <grains, <triggersynth, <pitchsynth, server, mode, record, gain, mix, speed, trigger, size, blur, dust, slope, back, chorus, detune, pitch, pan, track, jitter;

	*init {
		SynthDef(
			\grain_record,
			{
				arg in = 2, buffer = 0, mix = 0.5, record = 0.0;
				var insig = record * In.ar(in, 1);
				RecordBuf.ar(insig, buffer, 0, mix, 1 - mix, loop: 1)
			}
		).add();

		SynthDef(
			\grain_play,
			{
				arg out=0, buffer, blen, pitchb, triggerb, posb, modb, size=0.1, amp=0.5, pan=0, track=0.25, jitter=0, blur=0.0;
				var pitch, trigger, pos, pans, grains;
				trigger = In.kr(triggerb);
				pitch = In.kr(pitchb);
				pos = Wrap.kr(In.kr(posb, 1) + WhiteNoise.kr(blur), 0, 1);
				pans = pan + WhiteNoise.kr(jitter) + (track * (In.kr(posb, 1) - 1));
				grains = TGrains.ar(2, trigger, buffer, pitch, pos * blen, size, pans, amp);
				Out.ar(out, grains);
			}
		).add();

		SynthDef(
			\grain_pitch,
			{
				arg out, posb, triggerb, track=1, dir=1, detune=0.0, chorus=0, harmonics=2, pitch=0;
				var tracking, base, chor, det, csig, dsig;
				csig = Latch.kr(WhiteNoise.kr(), In.kr(triggerb));
				dsig = Latch.kr(WhiteNoise.kr(), In.kr(triggerb));
				tracking = Schmidt.kr(Slope.kr(posb), 0, 0) * 2 - 1;
				base = 2.pow(pitch) * dir * (track * tracking + (1 - track));
				det = detune * dsig + 1;
				chor = chorus * harmonics.pow((csig * 2).round) + (1 - chorus);
				Out.kr(out, base * chor * det);
			}
		).add();

		SynthDef(
			\grain_trigger,
			{
				arg out, freq=120, dust=0;
				Out.kr(out, (Impulse.kr(freq) * (1 - dust)) + (Dust.kr(freq) * dust));
			}
		).add();
	}

	*new { | buflen, inb, outb, posb |
		^super.new.init(buflen, inb, outb, posb);
	}

	// note that the default values here have been hand-picked to match the TouchOSC
	// defaults, which is Bad.

	init { | abuflen, ainb, aoutb, aposb |
		buflen = abuflen;
		inb = ainb;
		outb = aoutb;
		posb = aposb;
		server = Server.default;
		mode = 0;
		blur = 0;
		size = 0.1;
		trigger = 120;
		dust = 0;
		back = 0;
		slope = 1;
		chorus = 0;
		detune = 0;
		pitch = 0;
		mix = 0.25;
		pan = 0;
		track  = 0.5;
		jitter = 0.25;
		triggerb = Bus.control(server, 1);
		pitchb = Bus.control(server, 1);
		buffer = Buffer.alloc(server, server.sampleRate * buflen, 1);
		recorder = Synth.new(\grain_record, [
			\in, inb,
			\buffer, buffer,
			\record, 0
		], server, \addToTail);
		triggersynth = Synth.new(\grain_trigger, [ \out, triggerb ]);
		pitchsynth = Synth.new(\grain_pitch, [ \out, pitchb, \triggerb, triggerb, \posb, posb ]);
		grains = Synth.new(
		\grain_play,
		[
			\out, outb,
			\buffer, buffer,
			\blen, buflen,
			\posb, posb,
			\triggerb, triggerb,
			\pitchb, pitchb,
			\modb, modb,
			\size, 0.1
		],
		server);
	}

	reset { | newbuflen |
		var newbuf = Buffer.alloc(server, server.sampleRate * newbuflen, 1), oldbuf = buffer;
		record.set(\buffer, newbuf);
		grains.set(\buffer, newbuf);
		buffer = newbuf;
		oldbuf.free;
	}

	mode    { ^mode }
	record  { ^record }
	mix     { ^mix }
	gain    { ^gain }
	speed   { ^speed }
	trigger { ^trigger }
	size    { ^size }
	blur    { ^blur }
	chorus  { ^chorus }
	detune  { ^detune }
	pitch   { ^pitch }
	dust    { ^dust }
	slope   { ^slope }
	back    { ^back }
	pan     { ^pan }
	track   { ^track }
	jitter  { ^jitter }

	mode_    { | v | mode = v; } // todo - playback mode in this class?
	record_  { | v | record = v; recorder.set(\record, v); }
	mix_     { | v | mix = v; recorder.set(\mix, v); }
	gain_    { | v | gain = v; grains.set(\amp, v); }
	size_    { | v | size = v; grains.set(\size, v); }
	pan_     { | v | pan = v; grains.set(\pan, v); }
	track_   { | v | track = v; grains.set(\track, v); }
	jitter_  { | v | jitter = v; grains.set(\jitter, v); }
	blur_    { | v | blur = v; grains.set(\blur, v); }
	trigger_ { | v | trigger = v; triggersynth.set(\freq, v); }
	dust_    { | v | dust = v; triggersynth.set(\dust, v); }
	slope_   { | v | slope = v; pitchsynth.set(\track, v); }
	back_    { | v | back = v; pitchsynth.set(\dir, if( v > 0, { -1 }, { 1 })); }
	chorus_  { | v | chorus = v; pitchsynth.set(\chorus, v); }
	detune_  { | v | detune = v; pitchsynth.set(\detune, v); }
	pitch_   { | v | pitch = v; pitchsynth.set(\pitch, v); }

}