Am Montag, 18. Februar 2008 15:39:54 schrieb Xavier Amatriain: > Comments below... > > > Configure-Stuff: > > I can't see anything wrong with configuration but I am wondering... why > did you decide to use KaiserBessel35?? > > > This is the way I create the temporary buffer in WindowSize (package is a > > CLAM::Frame) : > > > > Analysis: > > CLAM::Audio tmpAudio; > > tmpAudio.SetSize(package->frameSize()*4); > > CLAM::TIndex index = (package->frameSize()*2)-(package->frameSize()/2); > > tmpAudio.SetAudioChunk(index, package->GetAudioFrame()); > > Wait! index is constant? That means you are using some sort of zero > padding but then not > removing it properly at synthesis. What you should do is concatenate all > the frameSize samples > you get into your tmpAudio until you got enough to send it to the > analysis (i.e. do it four times and then > start sending). After that, you need to append the new frameSize samples > at the end of your buffer while > keeping the last frameSize*3 before those. Okay... I see. That means that I have an extra latency of3*frameSize. But if It's the way to get a working synthesis, I have to come along with that. I will elobarote on it. But that will mean some extra work somewhere else. Currently I will avoid this. ;)
> Also this is not correct :-( You can't just take the first frameSize*2 > samples and feed them to the OLA. > You need to take the center frameSize*2. Else the inverse window you are > applying does not correspond to > the one you applied in the analysis (in terms of where the center is). Well, but I looked up the code and SSynth does take the centerFreq +/- hopSize by itself. So the Audio size after the _specSynth.Do() is 1024 and not 2048. Or, what else do you mean? > Hope it helps! I had a look at the synthesied samples and understand how that change of amplitude happen. It has something todo with the zero-padding, I think. But I suppose it will work then. :) Karsten _______________________________________________ Clam-devel mailing list Clam-devel@llistes.projectes.lafarga.org https://llistes.projectes.lafarga.org/cgi-bin/mailman/listinfo/clam-devel
