Does this class exists?

Questions
6

This pretty much works:

(
var width = Window.screenBounds.width;
var channels = 2;
var wc = width * channels, wc2 = wc * 2;
var shift = (wc2 * 0.9).round(2).asInteger;
var index = 0;

d = FloatArray.newClear(wc2);

v = SoundFileView(nil, Rect(800, 200, 500, 400)).front
.alloc(width * 2, 2)
.gridOn_(false);

OSCdef(\recSummary, { |msg|
	var chan = msg[3..];
	chan = (chan ++ chan.neg).as(FloatArray);
	d.overWrite(chan, index);
	index = index + (channels * 2);
	if(index >= wc2) {
		// shift everything left
		d.overWrite(d[shift..], 0);
		d.overWrite(FloatArray.fill(shift, 0), wc2 - shift);
		index = wc2 - shift;
		defer { v.setData(d, startFrame: 0, channels: channels) };
	} {
		defer { v.set(index div: 2, chan) };
	};
}, '/recSummary', s.addr);

a = {
	var sig = SoundIn.ar(Array.series(channels, 0, 1));
	var trig = Impulse.ar(32);  // speed of updates
	var sampleCount = Phasor.ar(trig, 1, 1, 10e34, 1);
	// using FOS here as an integrator
	// because Integrator's coefficient is control rate only
	var runningSum = FOS.ar(sig.squared, DC.ar(1), DC.ar(0), Delay1.ar(trig) <= 0);
	var rms = (runningSum / sampleCount).sqrt;

	SendReply.ar(trig, '/recSummary', rms);

	// RecordBuf.ar( /* you fill in this part */ );

	sig * 0.1
}.play;

v.onClose = { a.release; OSCdef(\recSummary).free };
)

PS I think you absolutely do not want to ~b.loadToFloatArray an hour’s worth of audio every half second. Really, don’t do this.

EDIT: Replaced the synth, after finding a trick to do the RMS at audio rate. Now it reports a higher (more accurate) level.

hjh

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