Very desirable but really you need to be into the small list of games that used it's capabilities or be fascinated by how it runs complex tracker modules on low end hardware. Outside of that it's not nearly as useful as a sound blaster. Once you get to the Pentium era it's capabilities are also not required anymore.

I got a PicoGUS (GUS compatible card) because I really like the era of epic megagames that used the GUS and it has better quality than any other card for those games.

Congrats on the GUS! A Gravis Ultrasound is quite a card to find like that, especially for free!

Gravis Ultrasounds occupy an interesting place in PC audio history. I think they were the first (or one of the first) cards to offer wavetable samples for music. At the time you either had to have external MIDI device (e.g. MT-32) or more commonly rely on FM synthesis for music.

They also offer hardware mixing, so tracker music can be loaded in memory and then mixed on the card itself. Certain games, such an Epic Megagames' games (Jazz Jackrabbit, Epic Pinball, etc) made use of this. This allowed music playback at higher quality without placing strain on the CPU.

On the flipside, they weren't Sound Blaster compatible which meant you basically needed a Sound Blaster card alongside a GUS for full gaming audio support. As a result the GUS found more of a niche in the computer music and demo scenes at the time.

Personally, I really like GUS cards. While I never had one growing up, I did start collecting them when I got into retro computer building. I tend to put a GUS into almost every DOS system I have. Mainly to use with Epic Megagames' games, as well as music software like Scream Tracker and Impulse Tracker.

If you do build a system around it, you'll probably want more than one sound card just to have full compatibility for any games you want to play. Period correct builds would generally include 486 or Pentium systems.

It depends. How interested are you in mid-90's MS-DOS? What about demoscene and music modules/trackers?

Game support for this card was mediocre - I wouldn't do a new dedicated build around the GUS solely for gaming. The GUS really shines in demos and music trackers. As mentioned above, this was because of the design of the MIDI subsystem and hardware mixing. MIDI instrument samples were uploaded the on-board GUS RAM, but the system was equally flexible for uploading the samples from tracker modules to RAM and then play/mix in hardware without putting that load on the main CPU. Even if you ignore the CPU load, GUS hardware mixing sounds much cleaner than software mixing played through a Sound Blaster. I was recently at a European demoparty, and they still have a GUS in one of the old school compo PC's. It really was the demoscene standard.

I have scavenged a lot of 1990's hardware, and never came across a GUS. The PicoGUS project excited me enough to order PCB's and hand-assemble one of the early versions. It went into a dedicated build, running MS-DOS 6.22.

IMHO, a period-correct build would target 486DX@33MHz up to perhaps Pentium 133.

Game suggestions: Pinball Fantasies, Epic Pinball, One Must Fall 2097, Jazz Jackrabbit
Demo suggestions: Second Reality by Future Crew, Dope by Complex. (Just a starting point - there are countless others)
Module players/trackers: Scream Tracker, Cubic Player (I use v1.6 - later versions seemed to be worse with hardware support), Impulse Tracker, Fast Tracker 2

I am not overly familiar with the GUS. It’s interesting reading about the sample mixing and demo scene. Reminds me of my Amiga days. I guess the GUS is like Amiga’s Paula (audio) chip. Pinball fantasies has a great soundtrack. I will have to have a look and see how it sounds on a GUS compared to an Amiga.

In 1992, there was a lot of hype and excitement built up about the GUS - especially on USENET. I eagerly bought a GUS immediately when it became available in November, 1992 (spending $US 160 on it). It replaced an original Soundblaster v1.5 in my 386/33 system.

The difference in sound quality was amazing. For the time, the GUS was incredible - when supported natively. Games, MOD trackers, demos, MIDI tracks all sounded great with native GUS support. For everything else, you had to use a TSR for Sound Blaster emulation ("SBOS") or MT-32 emulation ("MEGAEM" - I think? ). Both worked poorly - if at all - with games and took up precious memory. Newer software versions released over time worked a little better but took up even more memory.

As a college student at the time, I had to sell my SB to help fund the GUS purchase, so having both cards in my system wasn't an option. I don't think that I knew that having two sound cards was even possible.

When I built a 486DX2/80 system in early 1995, that original GUS moved into it from the 386. Newer/better versions of the GUS came out over time - including the latter versions that had SB support in hardware, but I kept using my "classic" GUS.

When I finally built a Pentium 200MMX system in late 1997, I attempted to install my classic GUS in it, but I simply couldn't get it to work right in Win95. After five years of use, I had to give up on the GUS, and I replaced it with a SB AWE64 Gold.

I don't recall exactly what happened to my original GUS. It probably went with my old 486 when I gave it away.

Like the OP, I lucked into a free classic GUS a few years ago. I also have a PicoGUS but haven't had time to mess with it.

One thing I have read everywhere that can be a drawback: original GUS cards, as they age, are known to develop serious issues that may be difficult for an amateur to fix. With how much they go for on the secondary market, even non-working ones, if I came across it that way I would have said no for that reason. As yours came at no cost a refurbishment would likely be worth it.

I bought a non working/untested one last year and the only thing that was wrong with it was the very specific crystal for the GF1 chip was broken. ( 19.7568 MHz ) metal can
Which was easily fixed with a slightly faster crystal. (19.8MHz ) smd

I sliced open the metal can, removed the broken crystal, soldered the smd one in, closed the can and soldered it back onto the card. et voila, fixed GUS.

I even considered programming a SIT8008 to the exact frequency but that would've been more of a hassle and also 'slightly' more expensive. Buying the part, programmer and fixing up a small pcb to contain the required parts and hookup to power & ground.

AFAIK, that crystal breaking, getting damaged, is the main cause of problems with the GUS, mostly due to it's annoying placement on the card. Standing up, instead of laying down on the board.

voodoo1907 wrote on 2026-04-16, 10:44:

[...]

Is it worth the time and effort to build a dedicated system around it? I'd appreciate any thoughts or advice from someone who has used one of these.

What sort of retro stuff are you into?

This is a card for late DOS. If you're into that, you're in for a treat. As already mentioned support is limited, but better than most 'oddball' cards/standards. Back in the day, you either had this card and got hopelessly frustrated with its poor software AdLib/Sound Blaster emulation attempts, or you had a non-Ultrasound card. Today though, regular SB-compatible cards are so cheap you can easily do both. That's exactly what I have here in my late DOS system: a GUS with an SB AWE64 Gold next to it (and a third card for bug-free MIDI and real OPL3). Run games like Pinball Fantasies or One Must Fall 2097 and you'll understand what all the fuss is about.

Aside from games, this card was embraced by the demo scene. Not everybody's cup of tea, but very much a thing, on a par with the Amiga scene.

If you're not into late DOS stuff, it's pretty useless. Yes, it can make sound in Windows, but it's not 100% WSS compatible and Windows stuff doesn't use its features. In that case you could consider testing it and if it works, selling it to someone who would appreciate it and using the proceeds to get something that would be useful for you.

They sound decent for games that support them. A SB16 + Wavetable upgrade is probably better to have.

I wouldn't keep it. It can sell for 200+€ and something that costs this much, it's actual practical value for retro gaming is below budget cards you can pick up for 10% of the price.