Hello all, I have study how "create" sound for playing at a different pitch. That work on Matlab for now. I know too how create reverb I just need some value more creating a nice reverb. And I try to implement that under BeOS, but must I understand the format of the synth file from BeOS because we can't use it (copyrighted or not). In this case we need a free sound bank format (SoundFont?). A+ Jerome --