If LFS is using DirectSound, anyone who has sound in LFS could also run DirectX ASIO. Simple as that. It's not nearly as effective as native ASIO support of course, i think most if not all Creative cards these days have native ASIO, so a Creative card owner could run sound at ~2 ms latency.
The ASIO SDK was still completely free and without any form of royalties last time i checked.
What i'm saying is everyone has an ASIO card, even integrated $0.5 chips.
Attached is a realtime recorded clip of my budget realtek chip on my budget motherboard playing 9 channels of asio sound, using 6 different virtual instruments and 2 mastering plugins. At 16.6ms latency (DirectX).
Not really, ASIO has had DirectX drivers for over 7 years. With reasonably simple content such as LFS' engine sounds a budget card/chip should easily be able to run with latency well under 20ms.
Anti-aliasing is a way of making an image looks softer, by first rendering the image larger (hence the x2, x4) and resizing it to the final size with some trickery to make neighbouring pixels affect each others colour, resulting in softer edges due to more gradient changes in colour between close pixels.
Anisotropic filtering is a method for enhancing surface graphics rendering, mostly noticeable on steep slopes in the distance where there's usually quite a bit of blurring and loss of detail, which AF tries to reduce.
Follow Renku's first URL to find out how to turn them on.
If my numbers are right, 128mbit upstream could hold 8 racing cars at 3 pps, amount of cars drop by 1 car each step up in pps (4 pps 7 cars, 5 pps 6 cars.. )