The seeeduino music shield needs to be reset to activate the record mode.
According to http://seeedstudio.com/wiki/Music_Shield:
D14(A0) - Used for Reset of VS1053.
So, what reset button are you trying to connect the transistor to, and why? All you need to do to reset the VS1053 (it that is what you have) is set D14 HIGH for a period of time.