I’ve finally resolved the issue that was affecting some ASR-10’s from working properly with the SCSI board.
I’ll do another post with an in-depth discussion of the issue, but I’m almost certain that this issue affects the original Ensoniq SCSI boards as well. Unfortunately I sold the only genuine SP-3 board that I owned, however I’m building a few of the older generation of the SCSI board (which is 99% the same as the Ensoniq board) to verify this.
If you have an original Ensoniq SCSI board in your ASR-10, you can check for the problem by toggling between 30kHz and 44.1kHz. At 44.1kHz you will hear distortion or audio artifacts. It doesn’t happen every time you switch, and it will sound slightly different each time.
If it turns out the problem does exist on the original SCSI boards, I will be offering a solution to fix it.