Harmony Assistant is a all-in-one software product with digital audio capabilities.

The list of features in this program is so large that it cannot be enumerated here.

Let's quote some of them anyway :
-Complete score editor, with unlimited number of staves
-Page mode editing
-Automatic harmonizer
-Accompaniments & drum patterns in a few clicks
-Tablature calculation for miscellaneous string instrument
-Tablature calculation for Harmonica, diatonic accordion, wind instruments...
-Completely scriptable application. Many open
-source scripts are available, and you can write your own.
-Embedded softsynth : does not need any hardware other than a sound card.
-Digital Fx processors
-Midi, Kar, MOD, S3M... import
-Digital tracks (possible to import WAV, AIFF, MP3, OGG...)
-Digital track processing features : Wav
-to
-note pitch tracker, noise reduction, formant
-compliant pitch change, multi
-band equalizer...
-Export in miscellaneous digital file formats (WAV, AIFF, MP3, OGG...

But also :
-Gregorian notation
-Chord diagram library for various instruments
-Enables to build custom instruments from digital recordings
-Lute tablatures
-Street organ card printing
-Used concurrently with Virtual Singer (available separately), Karaoke and multi
-voices lyrics are actually sung.
-A freeware plug
-in (Myriad plug
-in) will enable visitors of your Web site to view, transpose, play or print your scores
-Several hours of free video tutorials will make your first steps easier.... and much more.

Just give it a try...