First of all, let me give thanks to the developer for *finally* bringing a bringing an instrument tuner to OS X with a real acoustic input!

For the product: Tested with my iBook built-in mike, the tuner is a little too sensitive for my acoustic guitar. It's true that some instruments have complex harmonics that may confuse FastPitch, but they don't seem to bother my 8 dollar Korg tuner nearly as much. Unfortunately, I don't have an audio-in jack so I can't tell if the situation would improve with a direct connection.

I hope that the next version of FastPitch will have some sort of sensitivity control to smooth out the "jumpiness" of the needle, as many professional tuners do. Otherwise, this is a great, easy-to-use product, and the frequency meters are a nice touch. I'm looking forward to the refinement of this application.