Will a voice recorder that captures our entire conversation on allowing this guy to honor his written warrentee suffice as a witness?

He's already stated to me he has no intention of honoring the warrentee, I doubt if he would be so forthcoming with that if a witness was there.

And what I fear if he does agree to make it right, assuming a Sheriff was present is that he would cause other problems with the car. I got a good motor in this car but he has no respect for the car, his work or myself as a customer.

But back to the original question.. Will a voice recorder that records his refusal you honor the warrentee on the car suffice as a witness?