Curt Sampson writes:

> 
> I've got an ASUS motherboard with a built in ESS Solo-1 sound chip.
> It appears to probe happily:
> 
>     eso0 at pci0 dev 6 function 0: ESS Solo-1 PCI AudioDrive ES1946
>     eso0: interrupting at irq 5
>     audio0 at eso0: full duplex, mmap, independent
>     opl0 at eso0: model OPL3
>     midi0 at opl0: ESO Yamaha OPL3
>     mpu0 at eso0
>     midi1 at mpu0: ESO MPU-401 MIDI UART
> 
> and programs play to it, but it doesn't work; I just get a some
> low-level, long steady tones from the left speaker when I try to
> play anything. It also makes some noise when nothing's playing to
> it, in particular, a chattering noise when the hard drive is being
> accessed.
> 
> It works ok under Windows.
> 
> Any thoughts on what might be going wrong here?
> 
> I'm running a quite recent kernel:
> NetBSD agnostic.cynic.net 1.4P NetBSD 1.4P (GENERIC) #0: Wed Jan  5 13:18:11 EST 2000

Make sure you have this version:

/*	$NetBSD: eso.c,v 1.16 1999/12/28 19:26:26 kleink Exp $	*/

That should fix the tones.  Could the noise you hear when the hard
drive is accessed be electrical noise?

Cheers,

Dave