Hi,

sorry, I did give the wrong explanation of the different instruments. It should be:

Instr 1 plays the original sound. 
Instr 2 plays the sound scaled by p4 of instr 10 using pvscale
Instr 3 should reproduce the original sound by first scaling by p4 of instr 10 using pvscale and then by 1/p4 using pvsftw/pvsftr
Instr 4 plays the sound scaled by p4 of instr 10 using pvsftw/pvsftr
Instr 5 should reproduce the original sound by first scaling by p4 of instr 10 using pvsftw/pvsftr and then by 1/p4 using pvsftw/pvsftr again.

I expected sound 1, 3 and 5 to be the same and sound 2 and 4 to be the same. But only instr 5 reproduces the original. From the output of instr 21 you see what happens: pvsftw/pvsftr preserve the centroid. This makes sound 2 and 4 (3 and 5) sound differently. 


Karin

Csound mailing list
Csound@listserv.heanet.ie
https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
Send bugs reports to
        https://github.com/csound/csound/issues
Discussions of bugs and features can be posted here