230 loops of play-along tracks to practice chord progressions and chord types in all 12 keys You can combine loops or cut them to your needs and practice in any key. Loops are 16 to 32 measure long. Professionally produced tracks, a great tool to work with the Encyclopedia of scales books and Dvds Suitable for all instruments Type of scales you can work on with those play alongs : Major, melodic minor, harmonic minor, double harmonic minor, harmonic major, pentatonics, blues, half diminished, whole tone, augmented, prometheus, messiaen and more … Covered chord types : Maj7, Maj7#11, Maj7#5, Min7, MinMaj7, Min7b5, 7, 7#11, 13b9, 7 Alt, Major and minor drone Slow and Fast ii V I Major and ii V i minor The Full Pack Version includes 230 Loops in WAV and Mp3 formats as well a video tutorial This Data DVD is over 2.2 Go (approx 3 audio cds)