HanJammer wrote on 2020-11-18, 09:21:
Not really anything special and condition of some cards is so-so but will come in handy for building some rigs for sale... I'm mostly interested in the MiroMedia Surround card - addon DSP for regular sound cards. It implements Dolby Surround for 2 or 2+1 speaker setup so I hope for it being a bit more than just another 'spatializer' which was a common thing on sound cards back then... Also the Digitan DSAC-300 sound card seems a bit uncommon. Havn't seen one before...
Dolby Surround in case of this card (Dolby were never consistent with what they called "Dolby Surround") refers to the Dolby Pro Logic encoder, it's not really implemented by the card. I don't know of any technologies older than DTS Connect/Dolby Digital Live that would do something like that on the PC.
Looking at the manual, the "JVC 3D-Phonic Surround-Soundsystem" is a technology that tries to reproduce surround sound on stereo speakers (virtual surround sound). Something similar to Aureal A3D (and a dozen of other technologies). But it needs surround sound as an input, so I don't think it will work with plain stereo sound. Looking further in the manual, the drivers for Win 3.1 offer 3D-Phonic only as an option for the Dolby Pro Logic mode, what would confirm my suspicions.
For stereo expansion, this card has the "Texas Instruments 3D Stereo Enhancement" and this is a "spatializer".
This will be a fun card if you find something with a Pro Logic soundtrack. I'm not a movie wiz, but maybe there are Video CDs with such soundtracks. Will have to look through my parents Video CDs collection for Dolby logos 😉