I have an Arduino uno and a wave shield. I tried using an audio file that was formatted using Audacity in wav(microsoft). I got an error that said it was not a valid wav file. I am doing all of this on an IMac. Is the format different for the mac? Audacity also formats in AIFF which seems to be the mac standard format for audio. Will the wave shield read AIFF? Please don't tell me I have to use a PC.