Jim is correct, they are not related.  The only things you hear from the
system speaker are bios level alerts, like the beeps at boot up and temp
alarms in some cases.  There are four pins on the motherboard connector for
the system speaker but only two, one on each end are used.  The middle two
are not used.

The sounds that you are calling system sounds are the standard windows
sounds the OS uses when you install a sound card.  These are accessed
through the sound applet in the Control Panel.

There is a driver that Microsoft used to offer that would let you hear other
sounds, just beeps really, through the system speaker but I haven't seen it
for a while and I really don't remember much about it.  It seems to me that
Win3.1 and maybe early Win95 would play some default beeps this way.   Maybe
someone else on the list remembers more than I do about it.

Ben Moore




----- Original Message -----
From: "Demetri Kolokotronis" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, September 05, 2000 9:38 AM
Subject: Re: [PCBUILD] Computer Speaker


> No attempt was made to hear sound from both internal and external
> speakers.
>
> My primary question is whether case wiring is correct on computer I
> built, as I hear no sound from internal speaker, although I hear "system
> sounds" from external speakers. I hear audio through external speakers,
> and that is not an issue.
>
> Jim Meagher stated internal speaker and external speaker circuits are not
> related, but did not explain why, if this is so, I hear "system sounds"
> from external speakers.
>
> Joe Cuffy stated, contrary to above, that plugging in external speakers
> transfers internal speaker input to external speakers. However, I do not
> hear "system sounds" from internal speaker with external speakers
> unplugged, indicating that plugging in external speakers does not affect
> internal speaker.
>
> No one has addressed whether the fact that mobo has four speaker
> connections, while internal speaker has two leads, leaving two mobo
> speaker connections unfilled, relates to lack of output from internal
> speaker.
>
> I suspect something is missing in internal speaker circuit, and that
> software has routed "system sounds" to external speaker. Hearing "system
> sounds" only through external speakers has the disadvantage that I do not
> hear "system sounds" when external speakers are not turned on.
>
> Mobo:
>
> Data Out
> N.C.
> Ground
> +5V
>
> Speaker:
>
> White
> Orange
>
> Demetri Kolokotronis
>
.org>

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