Re: [LAU] USB2 Audio, PreSonus Audiobox 1818VSL -- was: Sound Devices USBPre2, UAC2 status

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To: Robin Gareus <robin@...>
Cc: <linux-audio-user@...>
Date: Friday, January 11, 2013 - 10:17 pm

Hi,
There are some glitches in the current ALSA (1.0.25) implementation
of UAC2, at least when used with the 1818VSL. It does mostly work (in
UAC2 mode, too). What I have noticed, aside from the click, is this:

- The sample clock selector doesn't work by default. I made a patch
that addresses this:
http://mailman.alsa-project.org/pipermail/alsa-devel/2013-January/058141...

- The mixer control names are all prefixed with "AudioBox 1818 VSL
Clock Selector" (which is the name of the first control)

- Note that there are two mutes in the mixer-- one per-channel and one
master mute. The same is true of input muting. If you're not hearing
anything, check this first.

- Don't turn it off when an audio stream is processing or it'll risk a
kernel panic. Or, at least, that has been my experience.

- There appears to be a general compatibility issue with i7 and the
PreSonus (cross-platform; it'll happen on Windows too). I believe this
is a known bug that is being addressed. This manifests as a subtle
click once a minute or so, from the machine I tried it on.

Lemme know how it works out for you!

-Louis

On Fri, Jan 11, 2013 at 7:32 AM, Robin Gareus wrote:

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Messages in current thread:
Re: [LAU] Sound Devices USBPre2, UAC2 status, alexander, (Mon Jan 21, 3:00 pm)
Re: [LAU] Sound Devices USBPre2, UAC2 status, alexander, (Fri Jan 25, 10:37 pm)
Re: [LAU] USB2 Audio, PreSonus Audiobox 1818VSL -- was: Soun..., Louis Gorenfeld, (Fri Jan 11, 10:17 pm)
Re: [LAU] USB2 Audio, PreSonus Audiobox 1818VSL, Robin Gareus, (Tue Jan 15, 8:34 pm)
Re: [LAU] USB2 Audio, PreSonus Audiobox 1818VSL, Louis Gorenfeld, (Tue Jan 15, 10:44 pm)
Re: [LAU] Sound Devices USBPre2, UAC2 status, alexander, (Mon Jan 7, 5:28 pm)
Re: [LAU] Sound Devices USBPre2, UAC2 status, Hans Wilmers, (Thu Jan 10, 12:24 pm)
Re: [LAU] Sound Devices USBPre2, UAC2 status, Hans Wilmers, (Thu Jan 10, 9:11 pm)
Re: [LAU] Sound Devices USBPre2, UAC2 status, Hans Wilmers, (Thu Jan 10, 10:24 pm)
Re: [LAU] Sound Devices USBPre2, UAC2 status, alexander, (Mon Jan 14, 9:20 pm)