/proc/sound (or /dev/sndstat):
OSS/Free:3.8s2++-971130 Load type: Driver compiled into kernel Kernel: Linux puccini 2.2.12 #1 Sat Aug 28 19:27:42 EST 1999 i686 Config options: 0 Installed drivers: Type 1: OPL-2/OPL-3 FM Type 26: MPU-401 (UART) Type 2: Sound Blaster Type 29: Sound Blaster PnP Type 7: SB MPU-401 Card config: Sound Blaster at 0x220 irq 5 drq 1,5 SB MPU-401 at 0x330 irq 5 drq 0 OPL-2/OPL-3 FM at 0x388 drq 0 Audio devices: 0: ESS ES1869 AudioDrive (rev 11) (3.01) Synth devices: 0: Yamaha OPL3 Midi devices: 0: ESS ES1688 Timers: 0: System clock Mixers: 0: Sound Blaster