Re: Alsa simultaneous use of usb-sound card - BW problem

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Cmedia 6571 codecs are intel 8051 based codecs and have firmware on them to handle the usb protocol, i have another usb codecs which are plantronics, they have no problem when i use them 8khz and 8 bit, but when i use them as 16 bit and 48khz, the bandwidth problem occurs again.

On 4 Aug 2014 22:33, "Vladimir Mosgalin" <mosgalin@xxxxxxxxxxxxxxx> wrote:
Hi Ralf Mardorf!

 On 2014.08.04 at 19:05:37 +0200, Ralf Mardorf wrote next:

> On Mon, 2014-08-04 at 19:53 +0300, Burak METİN wrote:
> > When i use these cards with different usb buses, it is ok but i need
> > to use them in same bus.
>
> IIRC the plug'n'play audio USB driver is limited to USB1, for USB2
> proprietary drivers are needed. But perhaps I'm confusing something.
> Assumed I shouldn't be mistaken, then perhaps the bandwidth really is to
> small.

Can't be true.. Here is example of USB 2.0 audio device (bcdUSB: 2.00),
completely plug and play:

Bus 002 Device 005: ID 20b1:0002 XMOS Ltd
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass          239 Miscellaneous Device
  bDeviceSubClass         2 ?
  bDeviceProtocol         1 Interface Association
  bMaxPacketSize0        64
  idVendor           0x20b1 XMOS Ltd
  idProduct          0x0002
  bcdDevice            3.30
  iManufacturer           1 XMOS
  iProduct                2 XMOS USB Audio 2.0
  iSerial                 3 0000
  bNumConfigurations      2


--

Vladimir

------------------------------------------------------------------------------
Infragistics Professional
Build stunning WinForms apps today!
Reboot your WinForms applications with our WinForms controls.
Build a bridge from your legacy apps to the future.
http://pubads.g.doubleclick.net/gampad/clk?id=153845071&iu=/4140/ostg.clktrk
_______________________________________________
Alsa-user mailing list
Alsa-user@xxxxxxxxxxxxxxxxxxxxx
https://lists.sourceforge.net/lists/listinfo/alsa-user
------------------------------------------------------------------------------
Infragistics Professional
Build stunning WinForms apps today!
Reboot your WinForms applications with our WinForms controls. 
Build a bridge from your legacy apps to the future.
http://pubads.g.doubleclick.net/gampad/clk?id=153845071&iu=/4140/ostg.clktrk
_______________________________________________
Alsa-user mailing list
Alsa-user@xxxxxxxxxxxxxxxxxxxxx
https://lists.sourceforge.net/lists/listinfo/alsa-user

[Index of Archives]     [ALSA Devel]     [Linux Audio Users]     [Fedora Users]     [Fedora Desktop]     [Fedora SELinux]     [Big List of Linux Books]     [Yosemite News]     [Yosemite Photos]     [KDE Users]     [Fedora Tools]

  Powered by Linux