Description of Harmony Assistant program at Mac Shareware: Harmony Assistant is a all-in-one software product for composing, playing and printing music, with digital audio capabilities.
The list of features in this program is so large that it cannot be enumerated here.
Just give it a try...

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...

Harmony Assistant is a free to try software. You can free download and try it for an evaluation period.