Sibelius Audio on/off

Could it be possible to kill the sound which Sibelius makes whilst inputting notes, while at the same time having the audio still ive on the rest of the computer? I don't like to hear the notes as I input them, but I do like, for instance, to listen to the BBC World service in my web browser whilst I'm working on Sibelius.

Comments (1) Features , audio on, audio off, silent, volume, live playback off.