No problem... I hadn't seen a simple pattern generator (which didn't require parallel port adapter, dacs, etc) so I just wrote something simple to use the sound card.
Wow cool, I just happened across this forum and saw you guys discussing audio XY scanners. It's been awhile since I played with lasers, but I did write a small program a few years ago to generate lissajous patterns (spirograph) from your computer via sound card.
It's available for download on...