[linux-audio-user] stretching sound

Hi all! I've been trying to stretch a soundfile. It is a piano track with mostly two voices only. I did it with an fft plain phase vocoder. Now there are a lot of parameters and I got some undesireable delay. In general the stretched sound was good, but the delay is disturbing. So here's the question, how should I set the following parameters to get the best result? fft-length (as high as possible?), windows per second, window length, windowtype (hamming, triangular, kasier with several coeffecients). Any ideas or practical experience with that? - I'm NOT doing it in realtime, so CPU-time is no problem. I've got time! :-) Thanbks for any help or good ideas! Kindest regards Julien Julien Patrick Claassen jclaassen(a)gmx.de julien(a)c-lab.de http://www.geocities.com/jjs_home SBS C-LAB Fuerstenallee 11 33102 Paderborn Phone: (+49) 5251 60 6060 Fax: (+49) 5251 60 6065 www.c-lab.de