Landon, Getting the sound out of the PS1 engine is not something that ADPCM does. H1000 describes one way to do it by recording the whistle. There is a PS3 version of the engine 30-1704-1. You could get the whistle from that sound file. But I checked and the whistle for that model is 24 bit signed PCM. PS2 engines don't support PCM. You would have to use an audio editing program (like Audacity) to convert each whistle clip into 4 bit ADPCM. You could then replace the whistle in your PS2 49er. I don't how the quality of the whistle sound would be affected and you might not be any better off when the task is complete.
Mark
