ALSA error!

[BuddyZhang1]

When I use alsa tools to record sound on OPI PC2, but 'arecord' doesn't work with some errors. System output error information after using "arecord" arecord -d 5 -f cd -t wav sound.wav Normally, we should be wait 5's and get wav file "sound.wav", but this command costs 25's with some error.

root@Orangepi:~# arecord -d 5 -f cd -t wav sound.wav Recording WAVE 'sound.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo arecord: pcm_read:2031: read error: Input/output error

The system information of sound card:

root@Orangepi:~# arecord -l List of CAPTURE Hardware Devices card 0: audiocodec [audiocodec], device 0: SUNXI-CODEC sun50iw2codec-0 [] Subdevices: 1/1 Subdevice #0: subdevice #0

more information about sound card:

root@Orangepi:~# cat /proc/asound/cards 0 [audiocodec ]: audiocodec - audiocodec audiocodec 1 [sndhdmi ]: sndhdmi - sndhdmi sndhdmi

root@Orangepi:~# cat /proc/asound/cards 0 [audiocodec ]: audiocodec - audiocodec audiocodec 1 [sndhdmi ]: sndhdmi - sndhdmi sndhdmi root@Orangepi:~# amixer Simple mixer control 'Lineout volume',0 Capabilities: volume volume-joined Playback channels: Mono Capture channels: Mono Limits: 0 - 31 Mono: 31 [100%] Simple mixer control 'Lineout_L Mux',0 Capabilities: enum Items: 'MIXER_L Switch' 'MIXER_R+MIXER_L Switch' Item0: 'MIXER_L Switch' Simple mixer control 'Lineout_R Mux',0 Capabilities: enum Items: 'MIXER_R Switch' 'MIXER_L Switch' Item0: 'MIXER_R Switch' Simple mixer control 'ADC input gain control',0 Capabilities: volume volume-joined Playback channels: Mono Capture channels: Mono Limits: 0 - 7 Mono: 3 [43%] Simple mixer control 'External Speaker',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [on] Simple mixer control 'LADC input Mixer LINEINL',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [off] Simple mixer control 'LADC input Mixer MIC1 boost',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [off] Simple mixer control 'LADC input Mixer MIC2 boost',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [off] Simple mixer control 'LADC input Mixer l_output mixer',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [off] Simple mixer control 'LADC input Mixer r_output mixer',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [off] Simple mixer control 'LINEINL/R to L_R output mixer gain',0 Capabilities: volume volume-joined Playback channels: Mono Capture channels: Mono Limits: 0 - 7 Mono: 3 [43%] Simple mixer control 'Left Output Mixer DACL',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [off] Simple mixer control 'Left Output Mixer DACR',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [off] Simple mixer control 'Left Output Mixer LINEINL',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [off] Simple mixer control 'Left Output Mixer MIC1Booststage',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [off] Simple mixer control 'Left Output Mixer MIC2Booststage',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [off] Simple mixer control 'MIC1 boost AMP gain control',0 Capabilities: volume volume-joined Playback channels: Mono Capture channels: Mono Limits: 0 - 7 Mono: 4 [57%] Simple mixer control 'MIC1_G boost stage output mixer control',0 Capabilities: volume volume-joined Playback channels: Mono Capture channels: Mono Limits: 0 - 7 Mono: 3 [43%] Simple mixer control 'MIC2 boost AMP gain control',0 Capabilities: volume volume-joined Playback channels: Mono Capture channels: Mono Limits: 0 - 7 Mono: 4 [57%] Simple mixer control 'MIC2_G boost stage output mixer control',0 Capabilities: volume volume-joined Playback channels: Mono Capture channels: Mono Limits: 0 - 7 Mono: 3 [43%] Simple mixer control 'RADC input Mixer LINEINR',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [off] Simple mixer control 'RADC input Mixer MIC1 boost',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [off] Simple mixer control 'RADC input Mixer MIC2 boost',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [off] Simple mixer control 'RADC input Mixer l_output mixer',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [off] Simple mixer control 'RADC input Mixer r_output mixer',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [off] Simple mixer control 'Right Output Mixer DACL',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [off] Simple mixer control 'Right Output Mixer DACR',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [off] Simple mixer control 'Right Output Mixer LINEINR',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [off] Simple mixer control 'Right Output Mixer MIC1Booststage',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [off] Simple mixer control 'Right Output Mixer MIC2Booststage',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [off] Simple mixer control 'codec hub mode',0 Capabilities: enum Items: 'null' 'hub_disable' 'hub_enable' Item0: 'hub_disable' Simple mixer control 'digital volume',0 Capabilities: volume volume-joined Playback channels: Mono Capture channels: Mono Limits: 0 - 63 Mono: 31 [49%]

[BuddyZhang1]

Just I reboot my board and run "aplay -l", system can't find soundcard!! I use xfce4 desktop.

orangepi@Orangepi:~$ aplay -l aplay: device_list:268: no soundcards found...

So, fix way: chmod -R a+rwX /dev/snd

orangepi@Orangepi:~$ aplay -l \ List of PLAYBACK Hardware Devices ** card 0: audiocodec [audiocodec], device 0: SUNXI-CODEC sun50iw2codec-0 [] Subdevices: 1/1 Subdevice #0: subdevice #0 card 1: sndhdmi [sndhdmi], device 0: SUNXI-HDMIAUDIO sndhdmi-0 [] Subdevices: 1/1 Subdevice #0: subdevice #0

[BuddyZhang1]

Now, I found the user can't get sound card information and root user can get sound card. as follow: user: aplay -l

orangepi@Orangepi:/dev/snd$ aplay -l aplay: device_list:268: no soundcards found...

root: aplay -l

root@Orangepi:/dev/snd# aplay -l List of PLAYBACK Hardware Devices card 0: audiocodec [audiocodec], device 0: SUNXI-CODEC sun50iw2codec-0 [] Subdevices: 1/1 Subdevice #0: subdevice #0 card 1: sndhdmi [sndhdmi], device 0: SUNXI-HDMIAUDIO sndhdmi-0 [] Subdevices: 1/1 Subdevice #0: subdevice #0

For this issue, there are different copyright on /dev/snd, so we should set correct configure for /dev/snd, like chown orangepi:orangepi /dev/snd -R

The issue has solved, it can be closed.

[BuddyZhang1]

ALSA can' record and play audio For original system, ALSA library has been exited, we only need correctly configure alsa.

Use this patch to set OP PC2 ALSA configure. Patch: https://github.com/OrangePiLibra/OrangePi_H5SDK/commit/494adcca90cd5992c33157c59f6cb67a7aabde56