Seems that there is a problem in sending compressed attachments (and non compressed is over the max limit size for list). So, you can get the attachment with all the files at: http://www.celliax.org/c350_usb_sound.tgz Sorry for the mess, Giovanni On Nov 12, 2007 2:34 PM, Giovanni Maruzzelli <gmaruzz.lists@xxxxxxxxx> wrote: > > Hi list participants, > > I am using cellphones connected to soundcards as cheap gsm gateways > (more complex than that, actually. You can see the whole GPL project > at www.celliax.org). > > Maybe there is a way to not using soundcards, that would be *so* much > better: I found that Motorola c350 phones after receiving an AT+MODE=8 > command via USB, make available an usb sound device. > > That would be wonderful (less cables, more robustness, etc). Problem > is: the usb sound device do not plays or captures samples. > > I suspect that the usb audio has to be activated, maybe by an AT or a > P2K command. > > Or that a quirk has to be added to the alsa driver (snd_usb_audio). > > Do you know anything about (maybe the quirk to be added to ALSA driver...)? > > Do you have any hint? > > I'm available to do all the research-testing-debugging that may be useful. > > What happens is as follow: > 1) attach the c350 to usb > 2) is recognized as acm0 > 3) send at+mode=8 to c350 (via minicom, for eg) > 4) it changes its usbid, disconnect from usb, reconnect, is recognized > as acm1, makes available a sound device > 5) at commands work on the new acm1 > 6) trying to use the audio device directly (eg aplay -Dhw:1) do not > give errors on play (but no sound is head on the phone), gives error > pcm_read 1349 on record (eg arecord -Dhw:1) > 7) trying to use the audiodevice through alsalib does not gives errors > at all (eg -Dplughw:1) but does not caputeres samples, and no sound is > heard on the phone > > > In the tgz archive attached you can find the following files: > > > lusb_without -> result of lusb -vv with no device attached > > lsusb_with_ACM0 -> result of lusb -vv with c350 just attached, > recognized as acm modem > > lsusb_with_ACM1 -> result of lusb -vv with c350 after sending > at+mode=8 to him, he has disconnected and was recognized again, this > time as ACM1, with a lot of additional usb interfaces > > dmesg-acm0 -> result of dmesg after first c350 attachment > > dmesg-acm1 -> result of dmesg after at+mode=8 was sent to the c350 > > aplay-l -> result of aplay -l showing the c350 as an alsa device > > stream0_pstop_cstop -> result of cat /proc/asound/C350/stream0 while not active > > stream0_pstop_crun -> result of cat /proc/asound/C350/stream0 while > arecord -vv -Dplughw:1 -fS16_LE ciapa.raw (if using -Dhw:1 it fails > with error: "pcm_read:1349: read error: Input/output error"). arecord > does not gives errors, but do not write samples > > stream0_prun_crun -> result of cat /proc/asound/C350/stream0 while > aplay and arecord -vv -Dplughw:1 -fS16_LE ciapa.raw (if using -Dhw:1 > arecord fails with error: "pcm_read:1349: read error: Input/output > error", aplay works but no audio) arecord does not gives errors, but > do not write samples > > aplay_play -> results of aplay > > arecord_rec -> results of arecord > > Thank you all in advance, > > Giovanni Maruzzelli > _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
