Guennadi Liakhovetski wrote:
> On Tue, 2 Feb 2010, Michael Trimarchi wrote:
>
>
>> Guennadi Liakhovetski wrote:
>>
>>> (re-adding the list)
>>>
>>> On Tue, 2 Feb 2010, Michael Trimarchi wrote:
>>>
>>>
>>>
>>>> Hi,
>>>>
>>>> Guennadi Liakhovetski wrote:
>>>>
>>>>
>>>>> On Sat, 30 Jan 2010, Michael Trimarchi wrote:
>>>>>
>>>>>
>>>>>
>>>>>> Guennadi Liakhovetski wrote:
>>>>>>
>>>>>>
>>>>>>> Hi
>>>>>>>
>>>>>>> I know this question belongs rather to alsa-users, and I did ask it
>>>>>>> there,
>>>>>>> but got no solution so far. Maybe someone here can help.
>>>>>>>
>>>>>>> The recently posted SuperH SIU driver only supports stereo playback
>>>>>>> and
>>>>>>> capture (channels_min = channels_max = 2). Is there a way to tell
>>>>>>> alsa-lib
>>>>>>> to duplicate the mono-channel during playback and to mix recorded
>>>>>>> channels
>>>>>>> (or use one of them), if mono recording is requested?
>>>>>>>
>>>>>>>
>>>>>> I'm not an expert but I think that you can use plughw support of
>>>>>> alsa-lib
>>>>>>
>>>>>> pcm.record {
>>>>>> type plug
>>>>>> slave {
>>>>>> pcm record_hw
>>>>>> }
>>>>>> route_policy average
>>>>>> rate_converter "linear"
>>>>>> }
>>>>>>
>>>>>> I think that automatically change rate and channel for supporting mono
>>>>>> channel
>>>>>> too
>>>>>>
>>>>>>
>>>>> Thanks for the snippet, but, I'm afraid, it didn't help either.
>>>>>
>>>>>
>>>> Sorry can you explain a little bit more why it doesn't help you?
>>>>
>>>>
>>> I certainly gladly would explain this, if only I knew... It just doesn't
>>> change anything. Are you using it anywhere? If yes, with which hardware
>>> configuration and software (alsa-lib) versions?
>>>
>>>
>> alsa-lib 1.0.16
>>
>
> 1.0.22 here.
>
>
>> #define BUILD_PCM_PLUGIN_RATE "1"
>> #define BUILD_PCM_PLUGIN_ROUTE "1"
>>
>
> Yes, have these in include/config.h too.
>
>
>> Hardware android openmoko gta02. Test it with arecord 1 month ago
>>
>
> Ok, looks like openmoko has a few configurations, of which some are just
> mono, and the I2S is, of course, stereo only. So, did this work with the
> HiFi (I2S) interface and not with bluetooth?
>
I have tested it on the no-bluetooth interface. What is your testing
application and
the reporting error?
Michael
> Thanks
> Guennadi
> ---
> Guennadi Liakhovetski, Ph.D.
> Freelance Open-Source Software Developer
> http://www.open-technology.de/
>
>
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