Yes, all audio in Pepper II is correct. Love those Exidy sounds. Terribly underrated game plagued with a stupid title - should have just called it Zipper like they originally intended.
Frenzy and Venture play fine but suffer a little due to the sketchy joysticks. The large dead zone (in relation to the stick throw) that develops after the joysticks are broken in, coupled with the very short stick throw, means that it's easy to roll into unintended directions. Audio is a hair off in Venture but nothing ear bleeding.
If anyone has any specific questions, go for it! I'd rather everyone that buys one of these know exactly what they're getting so that straight up negative reviews can be avoided so that AtGames sticks with the license.