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 < vijayrakeshmunga...@gmail.com> 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 <alan01...@gmail.com> 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 <vijayrakeshmunga...@gmail.com> > wrote: > >> Hi All, > >> > >> Any suggestions? > >> > >> Thanks & Regards, > >> Vijay Rakesh > >> > >>> On 01-Feb-2021, at 14:00, Vijay Rakesh Munganda > >>> <vijayrakeshmunga...@gmail.com> 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@lists.sourceforge.net> 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@lists.sourceforge.net > >>>> https://lists.sourceforge.net/lists/listinfo/alsa-user > >> > > > > > > -- > > ------------- > > Education is contagious. >
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