The way I do it is to start with a line that works and change one thing at a time. Do a quick test and if it still works go on to the next change otherwise undo. 6 devices means 0-5.
On Mon, Mar 22, 2021, 9:39 AM Vijay Rakesh Munganda <vijayrakeshmunganda@xxxxxxxxx> wrote:
Hi Alan,
Thanks for the reply. I’m working on an embedded board which has 6 devices where 0-3 are playback and 4-6 are capture devices. Playback works fine but not recording. Whatever format I use I get an error saying as `unable to hw params` I tried plughw which also didn’t worked. I’m not sure where and how to debug this issue.
I have a mono mic for recording and it took Mono. I also tried with 8bit but I get same error.
Thanks & Regards,
Vijay Rakesh
> On 22-Mar-2021, at 17:43, Alan Corey <alan01346@xxxxxxxxx> wrote:
>
> This works for me
> arecord -D hw:0,0 -d 5 -f S16_LE -r 48000 -c 2 test.wav
> Recording WAVE 'test.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo
> root@pbp:/tmp/snd# ^C
>
> Do you really have 6 devices on card 0? And I don't know that I've
> ever seen a 32 bit wav file, 8 is often enough. Need to specify # of
> channels I think like -c 2. But I copied your line and started
> hacking it until it worked.
>
> The error message could probably be more informative, like which
> argument does it have a problem with.
>
>
>> On 3/22/21, Vijay Rakesh Munganda <vijayrakeshmunganda@xxxxxxxxx> wrote:
>> Hi All,
>>
>> Any suggestions?
>>
>> Thanks & Regards,
>> Vijay Rakesh
>>
>>> On 01-Feb-2021, at 14:00, Vijay Rakesh Munganda
>>> <vijayrakeshmunganda@xxxxxxxxx> wrote:
>>>
>>> Hi Clemens,
>>>
>>> I have tried both pulghw and also given supported sample rate/format, but
>>> I get same error.
>>>
>>> root@test:~# arecord -D hw:0,6 -d 5 -f S32_LE -r 48000 test.wav
>>> Recording WAVE 'test.wav' : Signed 32 bit Little Endian, Rate 48000 Hz,
>>> Mono
>>> arecord: set_params:1405: Unable to install hw params:
>>> ACCESS: RW_INTERLEAVED
>>> FORMAT: S32_LE
>>> SUBFORMAT: STD
>>> SAMPLE_BITS: 32
>>> FRAME_BITS: 32
>>> CHANNELS: 1
>>> RATE: 48000
>>> PERIOD_TIME: 125000
>>> PERIOD_SIZE: 6000
>>> PERIOD_BYTES: 24000
>>> PERIODS: 4
>>> BUFFER_TIME: 500000
>>> BUFFER_SIZE: 4000
>>> BUFFER_BYTES: 96000
>>> TICK_TIME: 0
>>>
>>> Thanks & Regards,
>>> Vijay Rakesh
>>>
>>>>> On 30-Jan-2021, at 22:13, Clemens Ladisch via Alsa-user
>>>>> <alsa-user@xxxxxxxxxxxxxxxxxxxxx> wrote:
>>>>>
>>>> Vijay Rakesh Munganda wrote:
>>>>> I had tried to record a sample audio using arecord, “arecord hw:0,6 -d
>>>>> 10 test.wav” but I got an error as unable to install hw params.
>>>>
>>>> Use plughw:0,x instead of hw:0,x to get automatic sample format
>>>> conversion.
>>>>
>>>> Or tell arecord to use a sample rate/format that your hardware supports.
>>>>
>>>>
>>>> Regards,
>>>> Clemens
>>>>
>>>>
>>>> _______________________________________________
>>>> Alsa-user mailing list
>>>> Alsa-user@xxxxxxxxxxxxxxxxxxxxx
>>>> https://lists.sourceforge.net/lists/listinfo/alsa-user
>>
>
>
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