Hi, I've been pulling my hair out for a while. Seems like I am not getting to the correct alsa config file. My goal is to be able to play stereo data on both card 0 (beaglebone HDMI) and card 1, USB audio adapter, separately. if I get card 0 working, then I will pull out card 1 and use the I2S data from the HDMI to drive external DACS directly.
I have Card 0 and Card 1 as below. Both cards work with speaker test except card 0, HDMI from a beaglebone Black, will only play one channel or the other, seems to change every time I boot, but it only plays one channel during that boot. So sometimes I boot and it plays only the left channel. other times I boot and it only plays the right channel. The other card, Card 1, USB audio, plays both channels with out an issue. I think my asound.conf file is to blame, and though I've read a lot, I can't seem to see what could be causing this issue as there is very little config information in there.
the only change I made to asound.conf was to test by changing 'card 1' to 'card 0' in the first 10 lines. Prior to making this change, and again, it is almost like alsa is configuring itself at every boot, 'card 0' wasn't listed by aplay and I couldn't run speaker test. Changing '1' to '0' allowed me to run speaker-test on card 0 and card 1, but again, card 0 only wants to play the right channel now. I am monitoring the SPI lines that are currently used for HDMI audio. When the right channel is tested, I see data on the I2S data line; when the other channel is tested, I see nothing (it drops off). I've tried noise, sine waves, etc with speaker-test c2.
aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Black [TI BeagleBone Black], device 0: davinci-mcasp.0-i2s-hifi i2s-hifi-0 [davinci-mcasp.0-i2s-hifi i2s-hifi-0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: Audio [USB Audio], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
asound.conf
thanks,
Jerry
I have Card 0 and Card 1 as below. Both cards work with speaker test except card 0, HDMI from a beaglebone Black, will only play one channel or the other, seems to change every time I boot, but it only plays one channel during that boot. So sometimes I boot and it plays only the left channel. other times I boot and it only plays the right channel. The other card, Card 1, USB audio, plays both channels with out an issue. I think my asound.conf file is to blame, and though I've read a lot, I can't seem to see what could be causing this issue as there is very little config information in there.
the only change I made to asound.conf was to test by changing 'card 1' to 'card 0' in the first 10 lines. Prior to making this change, and again, it is almost like alsa is configuring itself at every boot, 'card 0' wasn't listed by aplay and I couldn't run speaker test. Changing '1' to '0' allowed me to run speaker-test on card 0 and card 1, but again, card 0 only wants to play the right channel now. I am monitoring the SPI lines that are currently used for HDMI audio. When the right channel is tested, I see data on the I2S data line; when the other channel is tested, I see nothing (it drops off). I've tried noise, sine waves, etc with speaker-test c2.
aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Black [TI BeagleBone Black], device 0: davinci-mcasp.0-i2s-hifi i2s-hifi-0 [davinci-mcasp.0-i2s-hifi i2s-hifi-0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: Audio [USB Audio], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
asound.conf
Code:
pcm.onboard{ type hw card 0}ctl.onboard { type hw card 0}### Dsnoop splited channelspcm.onboard_capture_left { type dsnoop ipc_key 32 slave { pcm "onboard" channels 2 rate 48000 format S32_LE } bindings.0 0}pcm.onboard_playback_left { type dmix ipc_key 33 slave { pcm "onboard" channels 2 } bindings.0 1}pcm.onboard_capture_right { type dsnoop ipc_key 32 slave { pcm "onboard" channels 2 rate 48000 format S32_LE } bindings.0 1}pcm.onboard_playback_right { type dmix ipc_key 33 slave { pcm "onboard" channels 2 } bindings.1 0}### PLUGS ##### used with darkice### device = plug:plug_onboard_leftpcm.plug_onboard_capture_left{ type plug slave.pcm "onboard_capture_left"}pcm.plug_onboard_playback_left{ type plug slave.pcm "onboard_playback_left"}pcm.plug_onboard_capture_right{ type plug slave.pcm "onboard_capture_right"}pcm.plug_onboard_playback_right{ type plug slave.pcm "onboard_playback_right"}pcm.!default { type asym playback.pcm "plug_onboard_playback_left" capture.pcm "plug_onboard_capture_left" playback.pcm "plug_onboard_playback_right" capture.pcm "plug_onboard_capture_right"}Jerry
Statistics: Posted by cncjerry — 2024-04-27 20:11 — Replies 1 — Views 24