iReal Pro - Music Book & Backing Tracks
Simulates musicians that play an accompaniment for you. Create, modify, share, and gather chord charts of your favorite tunes for reference in the process of practicing. Provides 50 accompaniment styles, including Rock, Swing, Ballad, Country, Funk, Gypsy Jazz, Bluegrass, Reggae, Bossa Nova, Latin and 12 blues styles that come as a one-time purchase. Export charts in the PDF and MusicXML format and audio as WAV, AAC, and MIDI.