Please can someone show me working alsamixer settings so that I can compare them with mine to find the culprit?
P.S: I've just solved my problem, enter "alsamixer -D hw:0", press m to unmute a channel, unmute both "Line out" and "DAC", the Debian wiki gave me the hint:
https://wiki.debian.org/AlsaMixer
P.S: I've just solved my problem, enter "alsamixer -D hw:0", press m to unmute a channel, unmute both "Line out" and "DAC", the Debian wiki gave me the hint:
https://wiki.debian.org/AlsaMixer