WAV/PCM files were not played by Logitech Media Server, with zero logging in /var/log/squeezeboxserver/server.log, on a tiny installation of Debian Jessie.
I tried to tune log levels and found some tools lacking, such as “flac” and “lame”, but none of them fixed my problem, and still no explanation in the log files.
But I found something in the logs that led me in the right direction:
[16-08-29 23:03:04.3358] Slim::Player::TranscodingHelper::enabledFormat (209) Checking to see if wav-flc-*-* is enabled
[16-08-29 23:03:04.3360] Slim::Player::TranscodingHelper::checkBin (250) enabled
[16-08-29 23:03:04.3362] Slim::Player::TranscodingHelper::checkBin (252) Found command: [flac] -cs --totally-silent --compression-level-0 $START$ $END$ -- $FILE$ | [sox] -q -t flac - -t flac -C 0 $RESAMPLE$ -
[16-08-29 23:03:04.3364] Slim::Player::TranscodingHelper::getConvertCommand2 (446) Matched: wav->flc via: [flac] -cs --totally-silent --compression-level-0 $START$ $END$ -- $FILE$ | [sox] -q -t flac - -t flac -C 0 $RESAMPLE$ -
I was missing the “sox” tool!
So, I installed “sox”, and now the media server is properly encoding WAV/PCM audio files to FLAC (or something).