最終更新:2024-10-31 (木) 02:45:51 (178d)

aplay
aplay -l
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list all soundcards and digital audio devices

-l, --list-devices      list all soundcards and digital audio devices

表示

aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: I82801AAICH [Intel 82801AA-ICH], device 0: Intel ICH [Intel 82801AA-ICH]
  Subdevices: 0/1
  Subdevice #0: subdevice #0

処理

printf(_("card %i: %s [%s], device %i: %s [%s]\n"),
	card, snd_ctl_card_info_get_id(info), snd_ctl_card_info_get_name(info),
	dev,
	snd_pcm_info_get_id(pcminfo),
	snd_pcm_info_get_name(pcminfo));

card	0	snd_card_next
snd_ctl_card_info_get_id?(info)	I82801AAICH
snd_ctl_card_info_get_name?(info)	Intel 82801AA-ICH
dev	0	ALSA/デバイス番号? (snd_ctl_pcm_next_device?)
snd_pcm_info_get_id?	Intel ICH
snd_pcm_info_get_name?(pcminfo)	Intel 82801AA-ICH

処理
```
printf( _("  Subdevices: %i/%i\n"),
	snd_pcm_info_get_subdevices_avail(pcminfo), count);
```
snd_pcm_info_get_subdevices_avail?(pcminfo) 0
count 1 snd_pcm_info_get_subdevices_count?
処理
```
printf(_("  Subdevice #%i: %s\n"),
	idx, snd_pcm_info_get_subdevice_name(pcminfo));
```
idx 0 サブデバイスID (forのカウンタ)
snd_pcm_info_get_subdevice_name?(pcminfo) subdevice #0