<html><body>Hello, I'm not a programmer or Opus developer but I tried to test the sound quality of a music file (Nick Warren - Devil's Elbow, freely available from the author's Soundcloud account) encoded with libopus 1.2 RC1. I used Windows binaries from free-codecs.com. I noticed that in the case of my selected music file (which is generally harsh on lossy codecs as it's necessary to use quite a high bitrate to make differences between the original and processed file inaudible), there is a long drop of stereo to mono (or something which sounds similar) at the beginning of the track and a few others much shorter during the whole track lenght. The selected bitrate is 32 kb/s stereo and everything else on default values. This is not happenig with libopus 1.1.x. Also while generally the quality of sound at 32 kb/s is now better with libopus 1.2 than before (except for those stereo to mono drops, of course), at 48 kb/s (so probably CELT only) the quality seems slightly lower than with libopus 1.1.x. The difference is minimal but the sound feels a bit more "flat". Stereo to mono drops happens at 48 kb/s as well but they're not as noticeable. If you want, I can upload the encoded files somewhere so you can check them. I think this should be solved before the final 1.2 release as it strongly influence the sound quality of encoded files. Thanks for reading.<br></body></html>