From: Pieter P. <pi...@jo...> - 2008-07-16 07:47:29
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Dominic Sacré wrote: > Hi, > > I'm using a few VST plugins with dssi-vst, all of which produce some > crackling noise when running JACK using the FFADO backend. They all work > fine with ALSA, using the same sample rate and buffer sizes (48000/128/3). > > At first I thought this noise was somehow produced by the firewire audio > interface, but in fact I could record it by simply connecting the VST's > output to Ardour (within JACK). > A closer look at the recorded waveform revealed what was happening: At a > regular interval of 3072 frames there were small chunks of audio, each 128 > frames in length, which were simply a copy of the previous 128 frames. > > Of course it might well be that this is a bug in dssi-vst, and has nothing > to do with FFADO. So far I haven't noticed this problem with any other JACK > client. But I was very surprised that a change of backend could have an > effect like this on a direct connection between clients. > > Any ideas where the problem lies? Is there something I can do to fix this? I'm forwarding this to the jack devel mailing list, since I don't really see how ffado can have something to do with this. Greets, Pieter |