Since I re-installed Windows Pro 64, Sibelius 7 and drivers for my M Audio Delta 2496 Sound Card, I have been unable to hear Sibelius Sounds. I'm sure they are there, since I see the individual instruments on the mixer going up and down as I play through my music. I suspect it may be some kind of connection problem with the sound card but, unfortunately I have lost the instruction book.
Maybe someone could suggest a possible line of investigation. By the way, I also have a sound blaster Extreme Audio sound card installed.
Cheers,
John.