NRT Render - Buffer / FX Out

Questions
1

Hi,

I have a two-part request…

1: How do I create access for a buffer offline?

~s1 = Buffer.readChannel(s,“…texture_warper1.wav”,channels:0);

a =Pbind(\instrument,\grainBuf,
\sndbuf,~s1,
\dur,0.125,
);
~aScore = a.asScore(~dur);
~aScore.render(“grain.aiff”,headerFormat:“AIFF”,options:o);

2: How do I capture bus audio offline? This stream is being routed to ~rb which is a bus containing a reverb synth.

c = Pbind(\instrument,\sineTone,
\dur, Pseq([0.125,Rest(15-0.125)],inf),
\out,~rb,
);
~cScore = c.asScore(~dur);
~cScore.render(“sineTone.aiff”, headerFormat:“AIFF”);

Both renders produce silence. I’ve successfully rendered other patterns in this manner.

Thanks,

MJ

2
  1. Check out Pproto’s help page. It cover use cases with both buffers and effects. Here is an example from there, about buffers, which I have modified slightly to run in NRT.

SynthDef(\help_playbuf, { | out=0, bufnum = 0, rate = 1, startPos = 0, amp = 0.1, sustain = 1, pan = 0, loop = 1|
    var audio;
    rate = rate * BufRateScale.kr(bufnum);
    startPos = startPos * BufFrames.kr(bufnum);

    audio = BufRd.ar(1, bufnum, Phasor.ar(0, rate, startPos, BufFrames.ir(bufnum)), 1, 1);
    audio = EnvGen.ar(Env.sine, 1, timeScale: sustain, doneAction: Done.freeSelf) * audio;
    audio = Pan2.ar(audio, pan, amp);
    OffsetOut.ar(out, audio);
}).writeDefFile; 
// I changed this from .add to .writeDefFile so that the NRT server finds this synthdef

Pproto({
    ~newgroup = (type: \group).yield;
    ~sf1 = (type: \allocRead, path: Platform.resourceDir +/+ "sounds/a11wlk01-44_1.aiff").yield;
},
    Pbind(*[
        instrument:    \help_playbuf,
        dur:        Pseg([0,0,0.25,0.5, 0.75, 1],10).linexp(0,1,0.01,2),
        legato:        4,
        startPos:    Pn(Pseg([0,1], 20), inf),
        rate:        Pwhite(1, 1).midiratio,
        loop:        0,
        group:        Pkey(\newgroup),
        bufnum:        Pkey(\sf1)
    ])
).asScore(1).render("testScore.wav");
// and I changed this from .play to .asScore(1).render(...) for obvious reasons :)
  1. You’ll notice that in examples about effects, everything happens on bus 0. This is because your NRT server will record only signals that reach its output busses (that is, 0 and 1 if you run stereo). If your reverb outputs to bus 0, 1, or both, it should get recorded.
3

Fantastic this is just what I needed, everything worked out great, thank you!