linuxaudio.org

Quoting Markus Herhoffer :
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> I have the same output with the Maya USB. It's all right with that:

>

>> usb 2-1: USB disconnect, address 4

>> usb 2-1: new full speed USB device using ohci_hcd and address 5

>> HID device not claimed by input or hiddev

>

> Can you try:

> # cat /dev/urandom > /dev/dsp

> (Turn down the volume of your speakers and abort with Ctrl+C very quickly)

>

> This should produce a white noise completly independent from alsa. If

> you hear the noise you can be shure that there's all right on the device

> layer.

>

> Markus

>

Well, tried it and I got sound coming from my laptop speakers so I

suppose /dev/dsp is used by my laptop's integrated soundcard.

I also have a /dev/dsp1. I tried redirecting urandom to it and got this:

cat /dev/urandom > dsp1

cat: write error: Broken pipe
/dev/dsp and /dev/dsp1 area actually symbolic links to /dev/sound/dsp

and /dev/sound/dsp1, respectively.
Here are the contents of my /dev/sound directory:

crw-rw--w-   1 root audio 14, 12 2006-03-12 18:14 adsp

crw-rw--w-   1 root audio 14,  4 2006-03-12 18:14 audio

crw-rw--w-   1 root audio 14, 20 2006-03-12 21:19 audio1

crw-rw--w-   1 root audio 14,  3 2006-03-12 18:14 dsp

crw-rw--w-   1 root audio 14, 19 2006-03-12 21:19 dsp1

crw-rw--w-   1 root audio 14,  0 2006-03-12 18:14 mixer

crw-rw--w-   1 root audio 14, 16 2006-03-12 21:19 mixer1

crw-rw--w-   1 root audio 14, 32 2006-03-12 18:14 mixer2

crw-rw--w-   1 root audio 14, 48 2006-03-12 18:48 mixer3
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