Reply 20 of 59, by JidaiGeki
Indeed, it was a relief to hear audio! Especially as there were a couple of corroded legs on a component on the SCSI card. The quality of the music it played was decent enough, so if the hiss can be toned down or cancelled that would be great. The mixer doesn't seem to help much on this count, unlike others' experience with the PAS mixer. Hopefully others have a better experience than this with their cards.
The cards were installed in two systems:
1. Osborne 386SX, based on a Beam Systems motherboard, with a Seventeam power supply (original). Card was installed into the middle slot, with at least 2 empty slots on either side to minimise noise from other cards. Motherboard has electrolytics.
2. Soyo Socket 3 with 486DX2/66 Overdrive, with a generic "Low Noise Power Supply" of unknown wattage. Card is in the end slot (VLB) but it won't fit anywhere else on the board due to length; it's sitting next to the video card. Motherboard has tantalum caps.
Full driver install wasn't done on the 486 system, but it exhibited the same hiss from the time it was switched on. I'd be inclined to say it's a design issue, but don't really have better gear at the moment to be able to improve power filtering. Was thinking of a re-cap with audio grade caps, but that's a project for another time. Will see if I can get SCSI working next, and source a copy of Dune.