Thanks Bojcha. Your floats testfile works fine, the ints one
does give distortions here.
My chain is: mpc-hc -> lav audio (mixing multichannel to stereo; always outputting 32-bit ints) -> ffdshow (just to allow for ST; no other processing at all) -> Stereo Tool -> reclock (resampler)
I also made my own 8-channel 24-bit ints 48kHz testfile. It plays fine when the lav audio mixing matrix is normalized (green level meter in ST) but distorts (red level meter in ST) when one uses 'clipping protection' instead which shouldn't overflow according to the author of lav filters.
Again all tests made with ST default settings (which means all processing off, right?) and
audible distortions gone when pressing the bypass button.
EDIT: found out 2 things:
- When setting lav audio to use 24-bit ints distortion is gone. The question is where's the problem: other software works fine with lav, only ST doesn't so far.
- The first preset (constant volume, increased stereo) cannot be chosen in 7.03 (or it it just a title?)