[daeron80]

If the 44.1 file is the right pitch but the wrong speed, that could be a real pain. It's possible to use some sort of TC (Avid TC/E, Elastic Audio, Melodyne, Serato, etc) to time compress/expand by eye/ear. But it will never really be right, and will have artifacts. The last time that happened to me, I sent the file back to the keyboard player with instructions on how to get his sound card's sample rate and clocking set right and made him re-export his parts. But that wouldn't be possible for a live performance. If TC didn't prove workable with a couple of tries, the best plan would be to live without that track.