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Re: [Discuss-gnuradio] USB Audio Device name

From: Frederick E. Stevens
Subject: Re: [Discuss-gnuradio] USB Audio Device name
Date: Sat, 21 Apr 2012 08:40:48 -0500
User-agent: Mozilla/5.0 (X11; Linux i686; rv:11.0) Gecko/20120404 Thunderbird/11.0.1

Sent this yesterday, maybe it got lost in the shuffle.  I saw that someone else also responded to your question though.  I hope that you have resolved your sound card issue.  If not, then this may help as well.

I have the same audio device.  If you use the command line alsamixer, you can get card information from the F2 menu.  /proc/asound/devices contains information for each card.  I use hw:3,0 (my sequence of sound cards as I have two PCI sound cards and two USB cards) for both capture and playback on my XFI USB device.  It works without problems for me.  If the USB card is the only one you have then the device will be the default alsa device otherwise, it will be hw:*,0.  You can also do aplay -l and get a list of alsa devices and their addresses.

Hope this helps!


On 04/20/2012 11:52 AM, William Pretty Security wrote:

Hello Group;


I am trying to use an external USB Audio DAC.

According to the documentation in the audio source block, if I leave the device name

blank, the block will use the default alsa audio device.


My question is, how do I find out what the name of the USB device is ??


Typing lsusb –v produced the following:


Bus 002 Device 004: ID 041e:3042 Creative Technology, Ltd

Device Descriptor:

  bLength                18

  bDescriptorType         1

  bcdUSB               1.10

  bDeviceClass            0 (Defined at Interface level)

  bDeviceSubClass         0

  bDeviceProtocol         0

  bMaxPacketSize0        64

  idVendor           0x041e Creative Technology, Ltd

  idProduct          0x3042

  bcdDevice            1.00

  iManufacturer           1 Creative Technology

  iProduct                2 SB X-Fi Surround 5.1

  iSerial                 0

  bNumConfigurations      1


----- snip ------


Can anybody help here ??





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