A digital gain which can be regulated by two alsa mixer settings and a analog one. Following code snippets may help
you to use it.
amixer sset set -D hw:0 'DAC2 Analog' 50% amixer sset set -D hw:0 'DAC2 Digital Fine' 50% amixer sset set -D hw:0 'DAC2 Digital Coarse' 50%
=== Headset Output ===
Hardware access via
3.5mm standard stereo audio jack mounted on the top of the board
In order to activate headset output, following commands have to be executed on shell.
amixer set -D hw:0 'Headset' 0dB amixer set -D hw:0 'HeadsetL Mixer AudioL2' on amixer set -D hw:0 'HeadsetR Mixer AudioR2' on
=== Earphone Output ===
Hardware access via
TP606 = EAR.P TP605 = EAR.M which are on the backside of the board
In order to activate earphone output, following commands have to be executed on shell.
amixer set -D hw:0 'Earpiece' 6dB amixer set -D hw:0 'Earpiece Mixer AudioL2' on amixer set -D hw:0 'Earpiece Mixer AudioR2' on
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