snd_uaudio multichannel problems

Goran Mekić meka at tilda.center
Mon Oct 10 20:56:56 UTC 2016


On Mon, Oct 10, 2016 at 07:43:07PM +0200, Hans Petter Selasky wrote:
> On 10/10/16 19:31, Goran Mekić wrote:
> Hi,
>
> Up to 127 channels are supported using USB audio.
>
> Which version of FreeBSD are you using?
>
> What does dmesg say about your audio device.
>
> Channel numbers above 8, are only supported through bitperfect modes. Then
> you'll need something like virtual_oss, to subdivide the audio device into
> several 2-channel or 1-channel DSP devices.
>
> svn --username anonsvn --password anonsvn \
>       checkout svn://svn.turbocat.net/i4b/trunk/virtual_oss
>
> cd virtual_oss
> make all install
> man virtual_oss
>
> --HPS

Hello,

This is my dmesg:

dmesg | grep uaudio
uaudio0: <AudioBox 1818 VSL > on usbus1
uaudio0: Play: 96000 Hz, 18 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play: 88200 Hz, 18 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play: 48000 Hz, 18 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play: 44100 Hz, 18 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record: 96000 Hz, 18 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record: 88200 Hz, 18 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record: 48000 Hz, 18 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record: 44100 Hz, 18 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: MIDI sequencer.
pcm0: <USB audio> on uaudio0
uaudio0: No HID volume keys found.

I can run virtual_oss, but the man page is not very descriptive. Any chance there's a clarification out there? Thanks!

Regards,
meka
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