Rajashekhara, Sudhakar wrote:
> Troy,
>
>> I tried this patch on DM644x EVM and following are my observations:
>>
>> 1. Playback works fine.
>> 2. Record has some issues. Recorded stream has Loud volume on
>> the right side, and on the left, volume is very low.
>
> This was because of my faulty Line-In cable. I sincerely apologize
> for all the confusion caused.
>
>> 3. Loopback (arecord -f cd | aplay -f cd) has some issues.
>> Audio is bit noisy here.
>
> Loopback is still noisy with the proper Line-In cable and I also
> see underrun messages during loopback. Note that there are only
> 18-20 underrun messages after which they stop. As I had mentioned
> earlier, when I stop the loopback and start it again these
> underrun messages are not observed.
>
> Regards, Sudhakar
can you try something like
arecord -f cd -D hw:1,0 | aplay -f cd -D hw:0,0
to make sure a mixer is not involved?
Or something like below in .asoundrc
pcm.!default {
type asym
playback.pcm {
type plug
slave.pcm "hw:0,0"
}
capture.pcm {
type plug
slave.pcm "hw:1,0"
}
}
I'm not an ALSA expert so the syntax maybe be off.
Thanks
Troy
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