Re: [LAU] Sound Devices USBPre2, UAC2 status

Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]
From: <shal@...>
To: <linux-audio-user@...>
Date: Thursday, January 10, 2013 - 9:31 pm

----- Mail original -----

I have tried different kernel, 3.2 to 3.7.1, vanilla or ubuntu kernel.

The lsusb does not means that you are limited to 48000.

The lsusb provides the "devices descriptor" and a devices descriptors has one or more "configuration descriptor". The kernel chooses one of the "configuration descriptor".
In your device descriptor (provided directly by the device) there is two possibles configuration descriptons (the bNumConfigurations=2). The first one corresponds to the UAC1 mode in high-speed (this is my one configuration) and so limited to 48000. The second one is the UAC2 mode (the expected mode).

Perhaps the kernel choose the fist good one, so UAC1 .

Can you send the result of cat /proc/asound/USBPre2/stream0 ?

Olivier
_______________________________________________
Linux-audio-user mailing list
Linux-audio-user@lists.linuxaudio.org
http://lists.linuxaudio.org/listinfo/linux-audio-user

Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]

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, 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, , (Thu Jan 10, 9:31 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)