heuser.marcus@freenet.de wrote:
Tempest wrote:The ROM 3 has better filtering on its audio circuitry, so it has much better audio output quality.Well the only reason I've been avoiding the ROM 3 IIgs is the game incompatibility, although I'm not sure what hasn't been patched these days other than Skate or Die and ShufflePuck. It may be worth going to the ROM 3 to avoid this darn noise..Using a ROM 3 is no guarantee - I have that noise also. Both with the internal speaker and a SoundMeister card by ECON Technologies.
I'd be willing to bet that the problem is that the +12v filter capacitor needs replacing. If there are any filter caps close to the audio amplifier, they'd be a good bet, too. These filter capacitors "decouple" the intermittent loads on the +12v line, like disk drives, from the other loads, like the audio output amplifier. -michael New, faster SUDOKU v2.0 solver for Apple II's! Home page: http://members.aol.com/MJMahon/ "The wastebasket is our most important design tool--and it's seriously underused."