There are tow instances of playing a track.
The first transcodes into MP3 using lame.
Code:
--------------------
[18-06-25 17:23:54.6388]
Slim::Player::TranscodingHelper::tokenizeConvertCommand2 (617) Using command
for conversion: "/usr/share/squeezeboxserver/Bin/x86_64-linux/faad" -q -w -f 1
"/storage/Media/philsmusic/Bruce Springsteen/1975.12.30 The Ed Sciaky Archives
- Philadelphia 75 (The Tower Theater, Philadephia PA)/01 - Night.m4a" |
"/usr/local/bin/lame" --silent -q 9 --abr 320 - - & |
--------------------
Since you are explcltly interested in 24 bit - this is a setup I expect
you want to avoid but I think it will deliver an audible stream.
The second transcode into raw PCM - I think this may cause a problem for
24 bit source as IIRC LMS assume raw PCM to be 16 bit 44.1kHz.
Code:
--------------------
[18-06-25 17:24:08.4895] Slim::Player::Song::open (558) Tokenized command:
"/usr/share/squeezeboxserver/Bin/x86_64-linux/faad" -q -w -f 2
"/storage/Media/philsmusic/test.m4a" & |
--------------------
For force a similar setup to your, I used a Squeezelite player which has
been setup to only support pcm codec. LMS will convert all sources to
PCM to play. I get white noise when I play my test ALAC file whereas it
is OK when I test the source 24 flac (from which the ALAC was
generated).
This needs more investigation to determnined the root cause. Initial
places to look at
1. 24 bit sample size PCM stream is interpreted as a 16 bit sample size.
2. LMS knows about 24 bit sample size but 24 bit sample bytes are planar
and not interleaved.
You shoudl check to is to see if your player can accept Flac.
If this is a UPNP player - what formats does it advertise as supported.
I suspect the "fix" will likely involve change the alac transcoding from
using faad to ffmpeg with lots of exotic options on output.
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