Audio on midway '78 Space Invaders

Gambeno

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it has been so long since I've played space invaders in the arcade, but doesn't the ship have a sound when it shoots? For some reason I'm not hearing it in the machine I got. all other sounds seem to work except that one. Any clues?
Thanks,
Kane
 
Yes. It does. It should go "pew!". A single faulty sound is actually fairly common on Space Invaders. That game uses discrete audio, with an analog circuit for each sound. You've probably just got a bad op-amp.

-Ian
 
*sees Mark S. running towards this thread in the distance*

If you replace the caps for the sounds any are broken off... as 90% of mine were, make sure you use the right size caps for them. I guess on my "invader hit" sound... and while is sounds neat (IMO), it's not the right sound as I used a cap that was, apparently, too big.

So... yeah, double check the schematics, if you can find them, to make sure you use the right uF cap... because I was too lazy to look and I still am.
 
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