Hello List again Trying a ping on this. Might not be possible to give a good answer on the post but then maybe somebody can give me some sort of hints or pointer to some documentation or something. Best regards -- Tomas Tomas Nordin <tomasn@xxxxxxxxxx> writes: > Hello List > > I sent this question first to the alsa-user list but somebody > recommended somebody to send to this list instead when the user-list > don't get much attention. > > I have an external USB soundcard called Audiobox from Presonus, > https://www.presonus.com/products/AudioBox-USB. Somewhere I read that > this is a class compliant USB sound card. > > I use this card to record audio from a drum module (e-drums). I take the > audio signal from the head phones out socket on the module, and plug it > into input 1 on the card. The card has 2 inputs, for the moment I don't > use the second input but I consider it busy. For a minimum of hassle I > want to make my recording using arecord (want to use a command line > program). > > So the card is a kind of bedroom musician type of card that might have 2 > inputs, 4 inputs or 12 or whatever, to record a number of instruments at > the same time. But as I said, this card has two inputs. > > The audio signal from the headphones out socket (on the drum module) is > stereo. The card support routing that stereo sound from one input, in so > far that it can be heard in stereo from the cards head phones out. > > The following command lets me record audio from the card, > > $ arecord -c 2 -d 60 -f S24_3LE -r 48000 -D hw:1,0 s3.wav > > The resulting wav file has all hearable audio in the left speaker when > listening. > > Do you think it is possible to get that stereo signal from one input on > the card into a stereo sound file. Or somehow else get left and right > audio separately from that input 1 on the card. My guess on what's > happening now is that the stereo signal gets merged as mono into one > channel. > > Here are some listings: > > $ uname -a > Linux raspberrypi 4.14.79+ #1159 Sun Nov 4 17:28:08 GMT 2018 armv6l GNU/Linux > > $ arecord -l > **** List of CAPTURE Hardware Devices **** > card 1: USB [AudioBox USB], device 0: USB Audio [USB Audio] > Subdevices: 1/1 > Subdevice #0: subdevice #0 > > $ arecord --dump-hw-params -D hw:1,0 > Recording WAVE 'stdin' : Unsigned 8 bit, Rate 8000 Hz, Mono > HW Params of device "hw:1,0": > -------------------- > ACCESS: MMAP_INTERLEAVED RW_INTERLEAVED > FORMAT: S24_3LE > SUBFORMAT: STD > SAMPLE_BITS: 24 > FRAME_BITS: 48 > CHANNELS: 2 > RATE: [44100 48000] > PERIOD_TIME: [1000 1981429) > PERIOD_SIZE: [45 87381] > PERIOD_BYTES: [270 524286] > PERIODS: [2 1024] > BUFFER_TIME: [1875 3962858) > BUFFER_SIZE: [90 174762] > BUFFER_BYTES: [540 1048572] > TICK_TIME: ALL > -------------------- > arecord: set_params:1299: Sample format non available > Available formats: > - S24_3LE > > Any ideas anyone? > > Best regards > -- > Tomas > _______________________________________________ > Alsa-devel mailing list > Alsa-devel@xxxxxxxxxxxxxxxx > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
