Re: [sc-users] Large FFT Windows

[James Harkins <jamshark70@xxxxxxxxx>]

FFT on the server is really geared toward overlap-add calculation. If
I wanted a static FFT of a huge buffer, I'd do it in the client
instead.

// assuming a mono soundfile
f = SoundFile.openRead("sounds/a11wlk01.wav");

d = Signal.newClear(f.numFrames);
f.readData(d);

d = d.extend(d.size.nextPowerOfTwo, 0);

f.close;

c = d.fft(Signal.newClear(d.size), Signal.fftCosTable(d.size));

Now, c.real contains the magnitudes and c.imag the phases.

If you are going to do a lot of these at the same size, you can save
Signal.fftCosTable(*size*) in a variable and reuse the table.

hjh


-- 
James Harkins /// dewdrop world
jamshark70@xxxxxxxxxxxxxxxxx
http://www.dewdrop-world.net

"Come said the Muse,
Sing me a song no poet has yet chanted,
Sing me the universal."  -- Whitman

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