The Unofficial Sibelius Wiki - your source for tips and tricks to the worlds very best music notation software!
06/09/2010 - SIBELIUS 6.2 - WIKI software updated - Announcements

Hear sound from MIDI controller without inputting notes

To hear Sibelius play back as you play on your MIDI controller but without inputting any notes, select the staff in the score whose sound you want to hear, then hit Esc to deselect it: now when you play on your keyboard, you'll hear the notes echoed back, but no notes will be input.

Nice sounding reverb module

Makes dead/fake sounding computer generated files come to life

Altiverb - http://www.audioease.com/Pages/Altiverb/AltiverbMain.html