This isnt like one of those old "arpeggio dictionaries" in a paper book... Its a full-blown MIDI library thats over-flowing with thousands of professional, four-bar arpeggios! Youd have to purchase hundreds of "arpeggio dictionary" books to even come close to the content on this CD, and since theyre all in MIDI, you can hear the Arpeggio instantly with any MIDI instrument you have. No paper book could ever do that! Each Arpeggio is carefully crafted to follow correct harmony & voice leading rules and the result is amazing! Every inversion is included and each arpeggio is notated with MIDI marker events so that you know exactly what harmony is voiced at each spot in the sequence!