Skip to content

Real time usage #15

Description

@fmiramar

Hi!

Is the TimeStrech2 supposed to work in this way? or is it only allowed to worked on SC's NRT mode ? (NessWindow.ar substituted for debbuging)


b = Buffer.read(s, Platform.resourceDir +/+ "sounds/a11wlk01.wav"); // remember to free the buffer later.

//NessStretch (improved paulstretch version)
(
SynthDef(\pb_monoStretch2_Overlap2, { |out = 0, bufnum, stretch = 100, startPos = 0, fftSize = 8192, fftMax = 65536, hiPass = 0, lowPass=0, amp = 1, gate = 1|
	var trigPeriod, sig, chain, trig, trig1, trig2, pos, jump, trigEnv, fftDelay, bigEnv, window0, window1, rVal, correlation, sum, localIn, rVal1, rVal2, outSig, analSig, fs0, fs1;

	trigPeriod = (fftSize/SampleRate.ir);
	trig = Impulse.ar(2/trigPeriod);

	trig1 = PulseDivider.ar(trig, 2, 1);
	trig2 = PulseDivider.ar(trig, 2, 0);

	startPos = (startPos%1);
	pos = Line.ar(startPos*BufFrames.kr(bufnum), BufFrames.kr(bufnum), BufDur.kr(bufnum)*stretch*(1-startPos));

	jump = fftSize/stretch/2;
	pos = [pos, pos + jump];

	sig = PlayBuf.ar(1, bufnum, 1, trig1, pos, 1)*SinOsc.ar(1/(2*trigPeriod)).abs*0.5;

	sig = sig.collect({ |item, i|
		chain = FFT(LocalBuf(fftSize), item, hop: 1.0, wintype: 0);
		chain = PV_Diffuser(chain, 1-trig1);
		chain = PV_BrickWall(chain, hiPass);
		chain = PV_BrickWall(chain, lowPass-1);
		item = IFFT(chain, wintype: -1);
	}).flatten;

	//delay the signal so that all fftSizes line up (the will already be delayed by the fftSize
	sig = DelayC.ar(sig, (3*fftMax/2)-(3*fftSize/2)+BlockSize.ir/SampleRate.ir, fftMax-fftSize+BlockSize.ir/SampleRate.ir);

	sig[1] = DelayC.ar(sig[1], trigPeriod/2, trigPeriod/2);

	sum = RunningSum.ar((sig[0]*sig[1]), fftSize/2)/RunningSum.ar((sig[0]*sig[0]), fftSize/2);

	rVal = Latch.ar(sum, DelayC.ar(trig1+trig2, (3*fftMax/2)-(3*fftSize/2)+BlockSize.ir/SampleRate.ir, fftMax-fftSize+BlockSize.ir/SampleRate.ir)).clip(-1,1);

	rVal = DelayC.ar(rVal, trigPeriod/2, trigPeriod/2);

	localIn = LocalIn.ar(1).clip(-1,1);
	localIn = DelayC.ar(localIn, trigPeriod/2-(BlockSize.ir/SampleRate.ir), trigPeriod/2-(BlockSize.ir/SampleRate.ir));

	rVal1 = (Latch.ar(rVal, trig1)>=0).linlin(0,1,-1,1)*
	Latch.ar(XFade2.ar(K2A.ar(1), localIn, EnvGen.kr(Env([-1,-1, 1], [trigPeriod, 0]), 1)), trig1);

	rVal2 = (Latch.ar(rVal, trig2)>=0).linlin(0,1,-1,1)*
	Latch.ar(XFade2.ar(K2A.ar(1), DelayC.ar(rVal1.clip(-1,1), trigPeriod/2, trigPeriod/2), EnvGen.kr(Env([-1,-1, 1], [trigPeriod, 0]), 1)), trig2);

	LocalOut.ar(rVal2);

	/*	window0 = NessWindow.ar(trig1, rVal.abs, fftSize)*rVal1;
	window1 = NessWindow.ar(trig2, rVal.abs, fftSize)*rVal2;*/

	fs0 = (1-(Slew.ar(
		1-Trig1.ar(trig1, fftSize/2/SampleRate.ir),
		SampleRate.ir/(fftSize/2),
		SampleRate.ir/(fftSize/2))));
	fs0 = (fs0*pi/2).tan**2;
	//fs0 = fs0*((1/(1+(2*fs0*(rVal.abs))+(fs0**2))).sqrt);

	fs1 = (1-(Slew.ar(
		1-Trig1.ar(trig2, fftSize/2/SampleRate.ir),
		SampleRate.ir/(fftSize/2),
		SampleRate.ir/(fftSize/2))));
	fs1 = (fs1*pi/2).tan**2;
	//fs1 = fs1*((1/(1+(2*fs1*(rVal.abs))+(fs1**2))).sqrt);

	//window0 = fs0*rVal1;
	//window1 = fs1*rVal2;

	window0 = fs0*((1/(1+(2*fs0*(rVal.abs))+(fs0**2))).sqrt) * rVal1;
	window1 = fs1*((1/(1+(2*fs1*(rVal.abs))+(fs1**2))).sqrt) * rVal2;

	sig = DelayC.ar(sig, fftMax/SampleRate.ir, fftMax/SampleRate.ir);

	outSig = [sig[0]*window0, sig[1]*window1];

	bigEnv = EnvGen.kr(Env.asr(0,1,0), gate, doneAction:2);

	hiPass = hiPass*SampleRate.ir/2;
	lowPass = lowPass*SampleRate.ir/2;

	outSig = HPF.ar(HPF.ar(outSig, (hiPass).clip(20, SampleRate.ir/2)), (hiPass).clip(20, SampleRate.ir/2));
	outSig = LPF.ar(LPF.ar(outSig, (lowPass).clip(20, SampleRate.ir/2)), (lowPass).clip(20, SampleRate.ir/2));


	Out.ar(out, Mix.new(outSig)*bigEnv*amp);

	//Out.ar(out, [sig[0], sig[1], rVal1, window0, window1])
}).add;
)

Synth(\pb_monoStretch2_Overlap2, [\bufnum, b, \stretch, 2])

Activity

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Metadata

Metadata

Assignees

No one assigned

    Labels

    No labels
    No labels

    Projects

    No projects

      Milestone

      No milestone

      Relationships

      None yet

      Development

      No branches or pull requests

      Issue actions