How To Make All Output 16 Bit?

[R101]

[hondagx35]

[R101]

Thanks Frank. My mpd.conf is now writeable, but adding the format line to the file and restarting mpd does not make any difference. If I play an mp3 stream, the playback display shows 24 bit, and this is confirmed with a 'scope on the hardware.

I would be interested to know how this should work. Does MPD re-quantize the output from whatever software decodes the mp3, or does it instruct the mp3 decoder to output 16 bits?



https://pastebin.com/Wi7L6Dg6

[s.k.]

Hi,
I think this will do the trick

If you have upgrade the MPD to the latest, maybe it works just with the new entrys on mpd.conf
Give a try

[R101]

Thanks s.k., but I previously tried using soxr that way and could not get it to work. MPD just seems to ignore the added mpd.conf entries. As my music files are mostly 16 bit flac, the ideal solution would be to decode all non-PCM streams to 16 bit PCM rather than 24 bit, so that there is no need to re-quantize. I do not know if that is possible.

[hondagx35]

[R101]

[tml3nr]

[R101]

Well spotted tml3nr!

Frank,

I think I might have found the answer. It looks as if it is the XMOS interface which has to demand 16 bit from Rune, rather than the other way round. I had the interface set to have a left justified output. This passes on any bit depth sent from Rune, up to 32 bits. If I set the interface to output right justified 16 bits, that is what I get, whatever the input source and whether or not mpd.conf is modified.

I might have overlooked something, so no celebration yet, but there does not appear to be any crude truncation taking place.

[hondagx35]

Hi tml3nr,

thanks for pointing that out.

Frank