PV_BufRd analysis of multiple soundfiles

Questions
15

thank you so much also for the additional explanations. Im so happy :slight_smile:

i think instead of ~recBufs.add(subfolder.folderName.asSymbol it should be ~buffers.add(subfolder.folderName.asSymbol

ive adjusted the code with ~rate from this example PV Ugens and DXEnvFan (miSCellaneous) - #6 by dkmayer so you have each analysed Buffer with 12 different rates for playing back with PV_BufRd.
The syntax for a Pbind would be \buf, ~buffers[*\subfoldername*][*index of buffer*][\pvRecBuf][*index of playbackrate*],

see the code below, i hope my implementation is correct. I have tested it with
~buffers[*\subfoldername*][*index of buffer*][\pvRecBuf][*index of playbackrate*].numFrames; for the different playbackrates and it was working nicely.

(
// path to a sound file here
~path = PathName(thisProcess.nowExecutingPath).parentPath ++ "buffers/";
// the frame size for the analysis - experiment with other sizes (powers of 2)
~windowSize = 1024;
// the hop size
~hopSize = 0.25;
// Hann window
~winType = 1;
//different playback rates
~rates = (1..12) * 0.1 + 0.4;

~buffers = Dictionary.new;
PathName(~path).entries.do {
	arg subfolder;
	var soundfile, data, rates;

	~buffers.add(
		subfolder.folderName.asSymbol ->
		Array.fill(
			subfolder.entries.size,
			{
				arg i;
				// read size of Soundfiles
				soundfile = SoundFile.openRead(subfolder.entries[i].fullPath);

				protect {
					(
						pvRecBuf: ~rates.collect { |rate, i|
							Buffer.alloc(s, (soundfile.duration / rate).calcPVRecSize(~windowSize, ~hopSize))
						},

						sndBuf: Buffer.read(s, subfolder.entries[i].fullPath)

					)
				} { |err|
					if(err.notNil) {
						"Error opening '%'".format(subfolder.entries[i].fullPath.basename).warn;
					};
					soundfile.close
				};
			}
		);
	);
};

// this does the analysis and saves it to ~recBufs... frees itself when done (in addition uses rate)
SynthDef(\pvrec_2, {
	arg recBuf, soundBufnum, rate = 1;
    var in, chain;
    Line.kr(1, 1, BufDur.kr(soundBufnum) / rate, doneAction: 2);
    in = PlayBuf.ar(1, soundBufnum, rate * BufRateScale.kr(soundBufnum), loop: 0);
    chain = FFT(LocalBuf(~windowSize), in, ~hopSize, ~winType);
    chain = PV_RecordBuf(chain, recBuf, 0, 1, 0, ~hopSize, ~winType);
    }).add;
)

(
~buffers.do { |subdirArray|
	subdirArray.do { |buf|
		~rates.do { |rate, i|
			Synth(\pvrec_2, [
				\recBuf, buf.pvRecBuf[i],
				\soundBufnum, buf.sndBuf,
				\rate, rate
			]);
		};
	};
};
)