All of these are approved for use on your compositions! (Not all are free – beware!)
Noteworthy Composer: http://www.noteworthysoftware.com/composer/evaluate.htm
Finale Notepad: http://www.finalemusic.com/notepad/
Musescore: http://musescore.org/
Notation Composer: http://www.notation.com/NotationComposer.php
Noteflight: https://www.noteflight.com/login
other software:
This software will allow you to cut and clip an audio file: http://audacity.sourceforge.net/