AUDIOLINUX: Optimization of the operating system under Linux on USB key and on disk. Url = https://www.audio-linux.com/
This OS is intended for listening to audiophiles, real-time kernel and audio system optimization scripts. Very very good at listening ! Flac,DSD,DXD,... all audio format..
DAPHILE: Excellent, controllable from another PC or smartphone. Url = https://www.daphile.com
AUDIOPHILE LINUX: optimized for listening, under Linux. Url = https://www.ap-linux.com
WTFPLAY : high quality sound. Very small system size, with small text mode user interface.
Excellent also... utl = http://wtfplay-project.org/