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Hello I wonder if anyone has had success with sound on overo boards using Linaro. I just installed Linaro 12.01 (twice actually: desktop and alip images) Alsa seems to be installed and seems to think its running: (note I have a usb sound device + built in audio) root@linaro-alip:~# aplay -l * List of PLAYBACK Hardware Devices * card 0: overo [overo], device 0: TWL4030 twl4030-hifi-0 [] Subdevices: 1/1 Subdevice #0: subdevice #0 card 1: Set [C-Media USB Headphone Set], device 0: USB Audio [USB Audio] Subdevices: 1/1 Subdevice #0: subdevice #0 root@linaro-alip:~# However when I play a sound (mp3/wav) with aplay I cannot hear it. I have looked at adjusting alsamixer - both for the usb card (super simple) or for the overo codec (baffling, it has about 50 settings). When I enabled headset channels for the oevro codec, I do hear a little glitchy noise coming out, which I also hear when I begin and end playing a sound. However I can't hear the actual sound. I never hear anything at all on the USB sound device. The fact that I'm getting the same result using the built-in audio, and with a USB sound device, makes me think this is a configuration issue with linaro, and not faulty hardware (the USB sound device works on my ubuntu laptop). Has anyone had any success using audio on linaro 12.01, with/ without overo, any suggestions? Tim Redfern |
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I'm on the 12.02 release, but I think 12.01 sound works also. I haven't tried audio over USB though. From alsa-mixer I turned up the headset control and then unmuted all the other headset fields. I was able to play an mp3 using mpg123 and things seemed okay. I also played an ogg file via the Parole media player. |
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OK the problem was indeed that the mixer is configured wrong by default. of the 56 channel controls visible to alsamixer (!) the important ones seem to be: headset ( I unmuted everything called headset and turned up the vol) DAC2 analog (I turned this up) |