on 2013-09-12 at 18:13 Victor Lazzarini wrote:

> perhaps if you could give us a simple example of what you mean, we can
> have a look.

actually, the example in the manual fof.csd might do. but since it is
more complex (five fofs in parallel with formant morphing) i attach a
minimal fof instrument with an image of a spectrum section of its output,
as shown by snd (i also tried sonicvisualiser and wavesurfer). showing the
spectrum in dB and cutting at -90dB you can see a small but in my opinion
significant amount of energy in spurious components. cutting at -100dB
several other inharmonic components appear around higher harmonics. for
this analysis i used a blackman window of 8192 points. i think these
artifacts are clearly perceptible, but then again i can't really trust my
monitors, unfortunately... (perhaps my ears either?).