Created attachment 896272 [details] emerge --info media-sound/sidplayfp (2.7.0, but I see no reason why later versions shouldn't also be affected) searches for mpg123 output plugins at runtime to play back audio, but the ebuild does not have mpg123-output-plugins in RDEPEND, which causes it to be unexpectedly silent. Output to WAV (-w) or AU (--au) works fine. Additionally, it is possible to emerge sidplayfp with USE '-alsa -oss -pulseaudio', with mpg123 output plugins installed, and it plays sound just fine. Testing note: sidplayfp requires SID files to work. I suggest grabbing a copy of the High Voltage SID Collection, unpacking it, and running 'sidplayfp <path to a SID>'. Any SID in that collection should work fine, but I tested with MUSICIANS/T/Tjelta_Geir/Echoes.sid. Trimmed strace without media-plugins/mpg123-output-plugins installed: openat(AT_FDCWD, "/usr/lib64/mpg123/output_pulse.so", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) openat(AT_FDCWD, "/usr/lib64/mpg123/output_alsa.so", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) openat(AT_FDCWD, "/usr/lib64/mpg123/output_sdl.so", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) openat(AT_FDCWD, "/usr/lib64/mpg123/output_dummy.so", O_RDONLY|O_CLOEXEC) = 3 The program is silent in this case. With: newfstatat(AT_FDCWD, "/usr/lib64/mpg123", {st_mode=S_IFDIR|0755, st_size=4096, ...}, 0) = 0 openat(AT_FDCWD, "/usr/lib64/mpg123/output_pulse.so", O_RDONLY|O_CLOEXEC) = 3 The program plays back music.
