Quoted from dudah:Noticed that if you hit both flippers you can hurry through the animations for end of ball, mystery, etc.
Today upon hitting both flippers, the music cut out and the sound got way louder. On the next ball it returned to normal. After playing a bit more with it, I can easily recreate the issue.
Is this a common problem?
I know I'm running the 1.0 sound ROM but the 1.1 ROM readme doesn't mention anything about this.
I did have a very similar issue! Music was cutting out and sound got extremely loud after hitting both flippers. Tested it out a few more times and noticed that sometimes the game would even fully reset after hitting both flippers. I brought my A/V and power driver boards in for repair, but he couldn't find anything... solid 5v. Decided to test my outlets with a multimeter and found the culprit!
Apparently on hot days when everyone in our building has there air conditioning on, the voltage drops enough to cause issues. I bought a Tripp Lite Line Conditioner and that fixed it for me. Obviously I'd check your boards first to make sure there isn't a bigger issue, but might be the same thing. I was surprised that I hadn't been able to find anyone else with this issue when I was searching for a solution.