System is Red Hat Linux 9, kernel 2.4.20-8.

The PC has an onboard AC'97 codec and an outboard USB audio device. Given that I will have two /dev/dsp* entries, how do I figure out which hardware device each is referring to?

As I understand it, the "first" device will end up being minor number 3; the "second" device ending up with minor number 19. That's all fine and good, except how do I know whether the USB audio device was the "first" or the onboard card was the "first"?

I'm making an assumpting there is some ioctl() which will return information I can use, but I'm not sure what that might be. (Maybe even figuring out which driver is controlling a specific device...I can certainly figure it out from there.)

Anyway, that's my situation. Any advice?

Thanks!


Paul Braman
nitewave at tampabay dot rr dot com

Hi.

Check the output from 'dmesg' or /var/log/messages.

The kernel lists which cards have been assigned to which devices as it boots (or as the devices are added).

Dave