Anyone here use voice memos much? Have you noticed that if you tip the Treo 680 from vertical to horizontal that the voice quality will change from outstanding to extremely static?

I was making some test voice memos tonight while driving after also loading a trial version of Voice Dial.( which works fairly well escept the program's return verification voice is quite muffled). So I was testing the voice memo to see if that program suffered from playback muffling. But instead discovered this weird change in clarity when the device gets tilted!