Map button for audio record?

[Chemguy]

Is there a way to map a button to start an audio recording and stop when the button is released? This was the standard function of a side button on the i730 (where the menu button is on the omnia). The i730 has the button mapped to the "record" function and opens up the notes app to do it. While the omnia has the same notes app, it does not have a "record" function as a button map option.

Thanks.