[zombiegristle]

SOLVED. Delete the registry value for GifSpeed, and create a new one called GifPlayTime. It appears to have an offset, a value of 2000 played abotu 1/10 of a second of both GIF and WAV in sync, a value of 5000 played about 1.5 seconds of each. This is definitely the mechanism, although I don't quite understand the algorithm behind it, but now it's just a matter of me figuring out the exact value I want for my animation, and anyone else can adjust to taste for their own startups. [EDIT] Maybe not so much...I've tried values up to 200k, and it STILL cuts off after about 4 seconds. So, this may be the key controlling the sync between the two (GIF and WAV), but something else is controlling overall length. The DLL has references to GifPlayTime, StartGifDelay, StopGifDelay, GifInterval, and GifSpeed, so I'll keep fiddling...