Try downloading Nokia software. I think it's called Multimedia Converter or something for 3gp files. It's free... all you have to do is register. Note that 3gp uses a highly compressed audio and video format, most likely with very low bitrates so don't even expect mp3 quality here. You might even have to do a live transfer while playing back the file; easily doable with some audio interfaces. Use 'What-you-hear' with 'blasters.