aah, sorry, they seem to do it. It says so in the Csound manual entry for psfread: "Create an fsig stream by reading a selected channel from a PVOC-EX analysis file loaded into memory, with frame interpolation." Hector On Tue, Oct 14, 2008 at 3:57 PM, Hector Centeno wrote: > Mike, > > Thanks for your advice, it is helpful. I guess I should ad that I > would like to keep it CPU efficient so realtime synthesis can be done > (that's how I've been working). > > Do you (or anyone) know if the pvsfread and pvsdiskin interpolate when > reading from a table/file? > > Cheers, > > Hector > > > On Tue, Oct 14, 2008 at 3:46 PM, Michael Gogins wrote: >> To some extent the metallic sound is an inherent artifact of the phase vocoder process. It is convolution smear. The best way I know to control this is to produce an analysis that consists of a large number (hundreds) of partial tracks, and resynthesize using an oscillator bank with a large number of oscillators. This seems to reduce the smearing, at the cost of simplifying the sound and requiring a lot of processor power. It may also be possible to apply further processing to the partial tracks to get rid of high-frequency ringing sounds, before resynthesis. >> >> Others may have more experience in this area. >> >> Hope this helps, >> Mike >> >> -----Original Message----- >>>From: Hector Centeno >>>Sent: Oct 14, 2008 3:34 PM >>>To: csound@lists.bath.ac.uk >>>Subject: [Csnd] looking for advice on warming up phase vocoder processed sounds >>> >>>Hello, >>> >>>I've been using a lot the PVs family of opcodes to process sound >>>samples (doing time stretches, pitch shifting, smoothing, etc.) and >>>very often struggled trying to avoid "metallic" sounding results, >>>specially when doing time stretches (i.e. reading a PVX file with a >>>very slow pointer). One way I've been dealing with this is by using EQ >>>and reverb (tried also pvsmooth and pvsblur and didn't help much), but >>>I was wondering, are there any other techniques to avoid this? Is this >>>the result of analyzing using wrong parameters (I usually do: pvanal >>>-n 2048)? Do the PVS opcodes interpolate between windows? I've read in >>>some online articles about FFT in MAX/MSP and found mention to >>>interpolation as a way of increasing sound quality. Would this be a >>>way of avoiding it? >>> >>>Thanks! >>> >>>Hector >>> >>> >>>Send bugs reports to this list. >>>To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound" >> >> >> >> >> >> Send bugs reports to this list. >> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound" >> >