Package: pipewire Version: 0.3.65-3 Severity: normal Hi,
Unfortunately using mpv's Pipewire driver results in audio being resampled, which introduces resampling artifacts. While I discovered this bug in bookworm's mpv_0.31.1-4, I've confirmed that it is still present in 0.36.0-1. That said, as a result of the investigation when filing this bug, I found what seems to be evidence that points to Pipewire as the true cause of the bug. Any software that uses Pipewire directly, or pipewire-jack appears to be affected. Steps to reproduce: 1. Uninstall and disable pulseaudio (if it's installed). 2. Install pipewire-pulse. 3. Cp /usr/share/pipewire/pipewire.conf /etc/pipewire/pipewire.conf 4. Set "default.clock.allowed-rates = [ 44100 48000 88200 96000 ]" 5. Restart pipewire's --user session. 6. mpv --ao=pipewire 01.ripped.from-CD.flac 7. cat /proc/asound/card0/pcm0p/sub0/hw_params | grep rate rate: 48000 (48000/1) When playing music with mpd (with Pulse audio backed) or with "mpv --ao=pulse", the sample rate is correctly passed through to Pipewire, and thus to the hardware: rate: 44100 (44100/1) Yes, I tested to see if the creation of a pipewire.conf with "default.clock.allowed-rates", and it appears to be for bookworm's Pipewire 0.3.65-3. The people who would probably be bothered the most by this bug are those who purchased "High-resolution audio" files (sample rates up to 192kHz, and usually 24bit), because playback will be limited to 48kHz due to this bug, as well as people who can hear 44.1khz to 48khz resampling artifacts. With the hypothesis that it was a Pipewire bug, I tried running Audacious with pipewire-jack (with JACK output configured), and a popup dialogue showed "Error" The JACK server requires a sample rate of 48000 Hz, but Audacious is playing at 44100 Hz. Please use the Sample rate Converter effect to correct the mismatch. And testing with "pw-jack mpv --ao=jack 01.ripped.from-CD.flac" shows AO: [jack] 48000Hz stereo 2ch floatp and of course cat /proc/asound/card0/pcm0p/sub0/hw_params | grep rate shows rate: 48000 (48000/1) So yeah, it looks like Pipewire's default sample rate is always applied when using pipewire or JACK sinks, despite "default.clock.allowed-rates" being set, except with using pulseaudio. I'm not sure why this is the case, but it seems wrong that everything is buggy except Pipewire and Pulseaudio...and that's why I'm reporting this bug against pipewire. Please feel free to reassign if this is a naive assessment. I hope this is enough to identify which package[s] is[are] affected as well as to forward the bug upstream. Please let me know if any more info is required. Thanks, Nicholas -- System Information: Debian Release: 12.2 APT prefers stable-security APT policy: (500, 'stable-security'), (500, 'stable-debug'), (500, 'proposed-updates-debug'), (500, 'stable') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 6.1.0-13-rt-amd64 (SMP w/4 CPU threads; PREEMPT) Locale: LANG=en_CA.UTF-8, LC_CTYPE=en_CA.UTF-8 (charmap=UTF-8), LANGUAGE=en_CA:en Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages mpv depends on: ii libarchive13 3.6.2-1 ii libasound2 1.2.8-1+b1 ii libass9 1:0.17.1-1 ii libavcodec-extra59 [libavcodec59] 7:5.1.3-1 ii libavdevice59 7:5.1.3-1 ii libavfilter8 7:5.1.3-1 ii libavformat59 7:5.1.3-1 ii libavutil57 7:5.1.3-1 ii libbluray2 1:1.3.4-1 ii libc6 2.36-9+deb12u3 ii libcaca0 0.99.beta20-3 ii libcdio-cdda2 10.2+2.0.1-1 ii libcdio-paranoia2 10.2+2.0.1-1 ii libcdio19 2.1.0-4 ii libdrm2 2.4.114-1+b1 ii libdvdnav4 6.1.1-1 ii libegl1 1.6.0-1 ii libgbm1 22.3.6-1+deb12u1 ii libjack-jackd2-0 [libjack-0.125] 1.9.21~dfsg-3 ii libjpeg62-turbo 1:2.1.5-2 ii liblcms2-2 2.14-2 ii liblua5.2-0 5.2.4-3 ii libmujs2 1.3.2-1 ii libpipewire-0.3-0 0.3.65-3 ii libplacebo208 4.208.0-3 ii libpulse0 16.1+dfsg1-2+b1 ii librubberband2 3.1.2+dfsg0-1 ii libsdl2-2.0-0 2.26.5+dfsg-1 ii libsixel1 1.10.3-3 ii libswresample4 7:5.1.3-1 ii libswscale6 7:5.1.3-1 ii libuchardet0 0.0.7-1 ii libva-drm2 2.17.0-1 ii libva-wayland2 2.17.0-1 ii libva-x11-2 2.17.0-1 ii libva2 2.17.0-1 ii libvdpau1 1.5-2 ii libvulkan1 1.3.239.0-1 ii libwayland-client0 1.21.0-1 ii libwayland-cursor0 1.21.0-1 ii libwayland-egl1 1.21.0-1 ii libx11-6 2:1.8.4-2+deb12u2 ii libxext6 2:1.3.4-1+b1 ii libxinerama1 2:1.1.4-3 ii libxkbcommon0 1.5.0-1 ii libxpresent1 1.0.0-2+b10 ii libxrandr2 2:1.5.2-2+b1 ii libxss1 1:1.2.3-1 ii libxv1 2:1.0.11-1.1 ii libzimg2 3.0.4+ds1-1 ii zlib1g 1:1.2.13.dfsg-1 Versions of packages mpv recommends: ii xdg-utils 1.1.3-4.1 ii yt-dlp 2023.09.24-2~bpo12+1 Versions of packages mpv suggests: pn libcuda1 <none> -- no debconf information _______________________________________________ Pkg-utopia-maintainers mailing list Pkg-utopia-maintainers@alioth-lists.debian.net https://alioth-lists.debian.net/cgi-bin/mailman/listinfo/pkg-utopia-maintainers
