- One is simply named "ooh.au": https://web.archive....80/sound/ooh.au
Unsurprisingly, it's Duke saying "Ooh!". Not that remarkable, unfortunately, but this is not the same "Ooh!" from him saying "Ooh, I needed that!" or "Ooh! That's gotta hurt!"
- The other is slightly more interesting, "letsrock1.au": https://web.archive....nd/letsrock1.au
It's Duke saying "Let's rock!" with a repeated echo. This is not the same "Let's rock!" used at the skill menu, and the seemingly peculiar echo seems like it was meant for the menu selection sound. You'll note that the filename here is letsrock1, while the line used in the game is LETSRK03, suggesting other takes we've never heard.
Both sounds can be found on this page: https://web.archive..../frame_3dr.html
And this segues into my next interesting discovery on the site. Each image here links to a Duke-related piece of audio, and apart from the aforementioned Duke lines, we can see that Bobby linked to myrtle.mid which we know didn't actually end up in Duke 3D but rather only in Xenophage. But even better than that, the page provides a whole backstory for the track explaining how that all came to be! And there are even more backstories for most of the tracks he made pages for on his site!
With that in mind, I have collected all of the midi pages on Bobby's site that present historical backgrounds (sans the Doom ones which can already be found here and here):
Duke Nukem 3D
Duke Nukem 2
Wolfenstein 3D
Commander Keen
Other Apogee games
- Bio Menace - circles.mid
- Cosmo's Cosmic Adventure - breakdown.mid
- Major Stryker - dizzy.mid
- Realms Of Chaos - badlands.mid
- Blake Stone: Planet Strike (the page says Aliens of Gold, but Bobby is wrong, that hack!) - fortress.mid
- Xenophage - fromhell.mid
- Rise of the Triad - hereboy.mid
Other games
- Pickle Wars - linda.mid
- Pickle Wars - kingdill.mid
- Terrace - joecool.mid
- Terrace - cogitating.mid
- Zorro - fiorini.mid
- Zorro - zorro.mid
- Black Knight - afterburner.mid
- Black Knight - starman.mid
If you want to listen to the midis themselves, go here and either sort type by audio or add ".mid" as a filter.
And a lot of these tidbits are already fairly well known, but I also recommend checking out Bobby's Little Known Facts page.