The new install of Windows and DOS didn't help - same issue. Anyone have any other ideas about why this would be happening? Perhaps DMA channels? I'm at a loss. Only new finding is that 44khz files play back perfectly - so it looks entirely like a software setting that needs to be flipped.

-5v is present, the system has a valid new old stock AT power supply. I'm thinking it's an issue with the preload of Windows 3.1 at this point and will try doing an install from scratch.

Hi! Been trying to get my RAP-10 working in it's permanent home, an AT&T 486sx box. MIDI playback is perfect, but WAV is an issue. The card works perfectly in my HP Vectra VL33 under Windows for Workgroups 3.11 paired with an ALS100, but in the AT&T the sound card seems to play back all WAV files at …