I think the answer to this question is to archive gunbird recordings untill playbacking works. I haven't been able to make a reliable recording with it myself.(posted 8869 days ago)The current top recording was advertised to be 100k more than it playsback to with out sound.
There's a larger problem here. everyone who uploaded recordings for this game with out trying to play their own recordings back, or they would have realized they don't playback properly... you can sometimes but not always assume recordings made will playback.