Re: [Discuss-gnuradio] USB Audio Device name

[Volker Schroer]

Hello Bill

ls -l /proc/asound

shows the names of the cards.
On my system I get

dr-xr-xr-x 3 root root 0 21. Apr 10:56 card0
dr-xr-xr-x 4 root root 0 21. Apr 10:56 card1
dr-xr-xr-x 4 root root 0 21. Apr 10:56 card2
dr-xr-xr-x 3 root root 0 21. Apr 10:56 card3
-r--r--r-- 1 root root 0 21. Apr 10:56 cards
-r--r--r-- 1 root root 0 21. Apr 10:56 devices
lrwxrwxrwx 1 root root 5 21. Apr 10:56 HDMI -> card3
-r--r--r-- 1 root root 0 21. Apr 10:56 hwdep
lrwxrwxrwx 1 root root 5 21. Apr 10:56 M44 -> card1
-r--r--r-- 1 root root 0 21. Apr 10:56 modules
-r--r--r-- 1 root root 0 21. Apr 10:56 pcm
lrwxrwxrwx 1 root root 5 21. Apr 10:56 SB -> card2
dr-xr-xr-x 2 root root 0 21. Apr 10:56 seq
-r--r--r-- 1 root root 0 21. Apr 10:56 timers
lrwxrwxrwx 1 root root 5 21. Apr 10:56 V10 -> card0
-r--r--r-- 1 root root 0 21. Apr 10:56 version

V10 for instance is the funcube dongle.
As the sequence of cards differs on different boots, I put

pcm.V10_card {
        type hw
        card V10
}
ctl.V10_card {
        type hw
        card V10
        }

pcm.FCD {
        type plug
        slave.pcm V10_card
}
 into the .asoundrc file in my home directory.

Now I can adress the funcube dongle by using FCD as device name in the 
fcd block or in an audio source.

Volker


Am 20.04.2012 18:52, schrieb William Pretty Security:
> 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 ??
>
>
>
> Thanks;
>
>
>
> Bill
>
>
>
>
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