Quite a fight with Aurlaic ark mx+

[nikosidis]

Yeah, using USB external HD/memory stick as source of music files will give you the worst sound.  The best sound is using the internal storage.
Decreasing the latency needs you go to CMOS to change some setting.  There are some steps listed in here https://www.snakeoil-os.net/Manual/.
Have fun!

Thank you for the reply. Unfortunately using the internal SSD did not change anything. I did not hear any improvement in sound quality either. The sound is not the issue here anyway. It is always nice if it could be further improved but I'm happy as it is.
CMOS? That makes me think of battery Is not that hardware stuff? I tried to search for CMOS in the manual but found nothing.
In music player - alsa configuration. Is there something I could try there, with lower buffer or something?