[alsa-devel] No sound from usb on Motorola C350 cellphone

Giovanni Maruzzelli gmaruzz.lists at gmail.com
Mon Nov 12 14:57:34 CET 2007

With an old copy of motorola driver, the usb sound device was
recognized by windows XP, with mixer elements only for the playback. I
was  not able to record from it, playing give no errors, but no sound

With the last copy of driver from motorola developer devsite, on XP a
whole new "Motorola Device" is created, with the audio interface
listed on it in the usb control panel, but no audio device is
available for normal usage.

Needs more info, tests?

On Nov 12, 2007 2:50 PM, Alexander E. Patrakov <patrakov at gmail.com> wrote:
> Giovanni Maruzzelli wrote:
> > 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.
> Confirmed with my Motorola C350 cellphone. It appears to accept S16_LE, MU_LAW
> and A_LAW formats, 8 kHz sample rate, but actually records no data and plays no
> sounds (even if a cal is in progress).
> One question: what playback and recording functionality is available on this
> cellphone under Windows?
> --
> Alexander E. Patrakov

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