> pulseaudio assume surround21 is four channels For PulseAudio, surround21 is now three channels. It's mapped to four channels in alsa-lib, exactly which four channels is based on chmap information from the kernel.
> Does it mean that test with 5.1 downmix to surround21 ? Yes I believe 5.1 would be downmixed to 2.1. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1286021 Title: 2.1 surround support (userspace) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-lib/+bug/1286021/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs