Listening to music on my PR1.3 N9 I suddenly realized the music was in mono. The same FLAC played in stereo just fine on the desktop. And other FLACs, from the same musician on the same album even, were in stereo on the N9 as well.

Back at home I noticed the FLACs playing in mono are bit 24 bit per sample, while the others are 16 bit. I'm not sure whether it is downmixed to mono, or that only one channel is used, although I guess it's downmixed.

Being FLAC, I of course could downsample the affected tracks to 16 bps without losing quality on the N9, but I'd rather just have it work as intended.

• Why are 24 bps FLACs played mono? Bug in gstreamer? PulseAudio or PulseAudio configuration?
• How to fix it?