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MarmiteSandwich · (This post was last modified: 01-11-2026 21:54 by MarmiteSandwich.)

I have transcoding and replaygain working with these parameters:-

Code:

/opt/bubbleupnpserver/ffmpeg

convOut=-af volume=replaygain=track

mp4:wav24/-, mp3:wav24/-, alac:wav24/-, aac:wav24/-

This works as intended except for some tracks which were encoded by iTunes into aac at 160kbps mono (see jpg). These are played by my WiiM Ultra in wav24 in stereo, but at double fast time, making them all sound like Micky Mouse on helium gas. I know this is probably related to ffmpeg rather than MinimServer, but maybe someone can suggest a fix, other than re-encoding them all!

Some of these tracks were actually encoded at 128k mono, but I noticed that MinimServer groups them all (160k and 128k) in Audio Data as 128k for some reason, although this is not an issue for me.

Any suggestions welcome.
Marmite.
Edit: jpg attached.