Jurassic Park Pinball Audio Issue

DeLoreanRide

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I'm having a problem with the audio on a Jurassic Park Pinball. Most of the audio works fine such as the movie quotes, dinosaur noises, etc. However all of the background music sounds garbled. Its like the pitch of the audio is way too high.

For example, when you press start, its supposed to play the jurassic park theme. You can make out what it's trying to play, but its super high pitched, scratchy, and garbled. However, a helicopter shows up on the DMD and John Hammond says, "Welcome to Jurassic Park," and its clear as day.

Any ideas? I've already tried changing out about two thirds of the CAPS on the audio board. The only ones I havn't changed are the ones that go to the individual speaker channels because the speakers are working fine.

I made 2 recordings of audio samples:

The first is of the game with just the attract music playing, then a game starting, and a little bit of game play.
http://www.filedropper.com/jurassicparkpinballaudiosample1

The second sample is of the actual sound test in the diagnostics. First are voice quotes, then the background music. It's the background music that's distorted. None of that scratchy high pitched noise is supposed to be there.
http://www.filedropper.com/jurassicparkpinballaudiosample2

These recordings are exactly how it sounds from the game, as far as I can tell there is nothing misleading about the quality of these on a computer.

Thanks!
 
Last edited:
He got this fixed, it was a jumper setting in the wrong spot, apparently the games that use this soundboard almost all have the same page copied in the manual with the same jumper settings, but the settings actually vary from game to game.
 
Be nice if people would share the fixes to the problems they post about....not picking on him personally...but i think it would be helpful.
 
Yeah he doesn't get on here to often, I couldn't tell you the exact settings either (he's working in Florida for a few months) I'll tell him to come and post on it though. :)
 
I want to say the manual says to set one of the jumpers on 7, but the correct setting was on 6. I still sent him a text though. :)
 
There are 7 jumper locations on the sound board and 3 jumpers. According the manual, locations 1, 5, and 6 are to be jumpered. In order for my games sound to function properly, I needed 1, 4 and 7 jumpered. Apparently the schematic is a general schematic for all data east games of that period; however different games have different games.

My boards original setting when I got it was 1, 4, and 7. That was with the distorted audio.

I first went to 1, 5, and 6, like the manual says and lost all audio.

I switched to 1, 5, and 7 and still had no audio.

Then went to 1, 4 and 7 and finally got proper audio.

I was told that my original settings (1, 5 and 6), which differ from the manual, are the settings used on a lethal weapon 3 game; however I cannot verify this claim. Hope this helps the next person.

(PS just for clarification the jumpers are soldered jumpers, not simple movable jumpers)
 
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