In message , R.Wieser
writes:
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But on the other hand, on my system its listed under
System-devicemanagement-systemdevices-systemloudspeaker as a "normally
functioning device" with a driver inside "configmgr.vxd". I could imagine
I could access that vxd in some way.
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Rusty gears in memory turning for the first time in decades, so this may
not be at all relevant:

IIRR, the speaker output, even though a normal loudspeaker (of the sort
used in a cheap transistor radio, granted, but capable of at least
_some_ fidelity) was used, is only a digital, or at best binary, output;
IIRR, the speaker connected between said output and the +5V rail
(possibly via a capacitor). As such it could only produce beeps of
various frequencies. Or so it seemed initially ...

When sound cards were first appearing (and weren't cheap, hard though
that may be to believe!), someone (or maybe several someones) devised a
driver for the speaker-drive circuit that, by use of pulse-width
modulation, could make the speaker drive circuitry behave like a sound
card. The quality of the output was pretty atrocious, but just about
acceptable for some purposes. The "driver" was I think released as
freeware.

I _think_ the (software) driver emulated one of the "standard" sound
cards available at that time - probably one of the SoundBlaster family.

As I said, this may or may not be relevant!
--
J. P. Gilliver. UMRA: 1960/1985 MB++G()AL-IS-Ch++(p)Ar@T+H+Sh0!:`)DNAf

Imagine a world with no hypothetical situations...