[root@underguiz ~]# ossinfo 
Version info: OSS 4.0 (b1014/200803081733) (0x00040003) GPL
Platform: Linux/x86_64 2.6.24-ARCH #1 SMP PREEMPT Tue Feb 26 23:47:57 CET 2008 (underguiz)

Number of audio devices:	4
Number of audio engines:	13
Number of mixer devices:	1


Device objects
 0: osscore0 OSS core services
 1: audigyls0 AudigyLS interrupts=3 (3)
 2: ossusb0 USB audio core services
 3: vmix0 OSS transparent virtual support


Mixer devices
 0: AudigyLS Mixer (Mixer 0 of device object 1)

Audio devices
AudigyLS front                    /dev/oss/audigyls0/pcm0  (device index 0)
AudigyLS center/lfe               /dev/oss/audigyls0/pcm1  (device index 1)
AudigyLS surround                 /dev/oss/audigyls0/pcm2  (device index 2)
AudigyLS 5.1 output               /dev/oss/audigyls0/pcm3  (device index 3)
[root@underguiz ~]#