This is all very interesting to read. I have a Star Trek that I installed the Sega Multi-game into some months ago. Before the install, when I would power up I would hear the Star Trek theme music (as normal). After installing the multi-game I get what Mark describes here in #2 - VERY loud and very annoying - it continues until I call the menu up and do an initial game select from the multi-game menu then it stops. I attributed it to initial startup and the sound board not knowing which sound to play due to the multi-game and pay it no mind now. I just figured it was a small price to pay to have the multi-game in there...?
Anybody have any thoughts about this or similar experiences?
Regards,
Tom Cloud
Mark Jenison wrote:> So the Explosion Sound is normal, upon ELIMINATOR Boot Up,
> and I do hear the Fade Out,as well, but what about the
> constant backround White Noise or Static when I turn up
> the Volume, is this also Normal from your past experience ???
White noise/Static is never good. The problem is I can't hear what you are
hearing, so it's hard for me to say what is wrong :-). I've come across
*three* different static sounds, all of which could be a separate problem.
1) I once experienced a Star Trek upright that had a "crackle" static
associated with it. Swapping Universal Sound board and even audio amp did
not solve the problem. I never figured out the problem and sold the game
:-)
2) Universal sound boards often exhibit "white noise" as a failure condition
of some kind. I forget offhand what cause it (rams, addressing chips, etc),
but its very loud and very similar to that of TV static.
3) What you may be thinking is "static" may actually be a stuck sound. I
believe both Space Fury and Eliminator sound boards have a dedicated "white
noise" circuit if you look at the schematics. Sometimes when something
fails, a sound gets stuck on. A sound which uses the white noise circuit,
such as thrust or explosion, would be triggered repeatedly, and that
constant sound would sound like static. What you think is white noise or
static in this case would immediately sound like a stuck thrust or explosion
sound to me because I've debugged these boards so many damn times.
My guess, offhand, is that if you are hearing the explosion sound just fine,
since all the audio circuits are fed into a summing circuit near the end,
you are also hearing a stuck white noise related sound.
To debug this, first I'd go through test mode to see what sounds ARE being
correctly produced. Most likely if there is a sound you CAN'T hear during
test mode, that's the stuck sound. If that doesn't help, replace the
electrolytic capacitors in the circuits that use the white noise and see if
that helps. Then it comes down to pulling out the logic probe....
-- Mark Jenison --------------------------------------------------------------------------- ** To UNSUBSCRIBE from vectorlist, send a message with "UNSUBSCRIBE" in the ** message body to vectorlist-request@synthcom.com. Please direct other ** questions, comments, or problems to vectorlist-owner@synthcom.com. --------------------------------- Do you Yahoo!? Faith Hill - Exclusive Performances, Videos, & more faith.yahoo.com --------------------------------------------------------------------------- ** To UNSUBSCRIBE from vectorlist, send a message with "UNSUBSCRIBE" in the ** message body to vectorlist-request@synthcom.com. Please direct other ** questions, comments, or problems to vectorlist-owner@synthcom.com.Received on Wed Oct 9 09:41:10 2002
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