I made my own by downloading wav files of different deer sounds and burning them on a Disc. Then I titled all the tracks as to which call they were. Bought some cheapo amplified speakers from Radio Shack and a cheapo CD player from Walmart.

To me the calls sounded great. To the doe that heard it at 75 yards - it must've sounded like a starter pistol because she started sprinting the other direction FAST!

I think my idea has merit but the wave files could have had some background noise that I couldn't hear and the speakers amplified it? Or the calls I downloaded were just bad? Or the volume needed to be much lower. Either way - I'm leaving the CD player in my garage this year and bringing my grunt tubes back out.