Audio
If the sound card is detected:
; ls '#A' '#A/audio' '#A/audioctl' '#A/audiostat' '#A/volume' ; ls /dev/audiostat
You can check which pins are being used for input and output (output for Thinkpad x200):
; cat /dev/audiostat bufsize 1024 buffered 0 codec 0 pin 25 inpin 29 aout 16 c1d aout 17 c1d aout 18 211 beep 19 70000c ain 20 100d1b <- pin 29, pin 23 ain 21 100d1b <- pin 24 pin 22 out jack ext right hpout green <- aout 16, aout 17 pin 23 in nothing sep rear micin pink pin 24 in jack ext right micin pink pin 25 out nothing sep rear hpout green <- aout 16, aout 17 pin 26 out fix int N/A speaker ? eapd <- aout 16, aout 17 pin 27 out nothing ext N/A other ? eapd <- aout 16, aout 17 pin 28 out nothing ext N/A other ? <- aout 18 pin 29 in fix int N/A micin ? beep 30 f00000 outpath aout 16 -> pin 26 outamp aout 16 inpath pin 29 -> ain 20 inamp ain 20
This line `codec 0 pin 25 inpin 29` shows that pin 25 is being used for output and pin 29 used for input. On my laptop, it is necessary to set the output pin to 26:
; echo pin 26 > /dev/audioctl
Now it's possible to play music:
; audio/oggdec < music.ogg >/dev/audio ; audio/mp3dec < music.mp3 >/dev/audio
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NOTE:
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- http://nopenopenope.net/posts/audio
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- https://git.sr.ht/~ft/jacksense