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:


		     November 21, 2024






			   - 2 -


  ; echo pin 26	> /dev/audioctl



     Now it's possible to play music:


  ; audio/oggdec < music.ogg >/dev/audio
  ; audio/mp3dec < music.mp3 >/dev/audio







































__________________________

*    http://nopenopenope.net/posts/audio

*    https://git.sr.ht/~ft/jacksense



		     November 21, 2024