PV_PhaseShift90 shift phase by 90 degrees

PV_PhaseShift90(buffer)

Shift phase of all bins by 90 degrees.

buffer - fft buffer

See also FFT Overview.

Server.internal.boot;

b = Buffer.alloc(Server.internal,2048,1);

c = Buffer.alloc(Server.internal,2048,1);

(

{  arg out=0, bufnum=0;

var in, fft, fft2, shifted;

in = SinOsc.ar(500, 0, 0.4);

fft = FFT(b.bufnum, in);

fft2 = FFT(c.bufnum, in);

shifted = PV_PhaseShift90(fft); 

[IFFT(fft2),IFFT(shifted)];  

}.scope

)

b.free; c.free;