The Session Bb InstrumentsPlay along with the MP3s ( free MP3s Download link information provided at the back page of the book ) Or use the sheet music parts to build the band around you, use the piano accouplement parts for small performances or the complete accouplement band parts with Piano , Bass , Guitar , Drums.The Pack Lead Melody Parts are For Bb Instrumentation .Trumpet , Tenor Sax , Clarinet. The Session For Tuned InstrumentsThis Pack Comes With 10 Playalong tracks , Funk , Blues , Pop , Swing , Rega , Latin, 7/8 Rock , Motown , Hip Hop , Ballard.Tracks 1 to 10 with Melody { Demo of melody and Solos } Tracks 11 to 20 { No Melody , Play to the written parts Melodys & Solos or Improvise your own using the chord Sheets , Your Session Pack comes with : PIano , Guitar , Bass Guitar , Drum Kit , Chord Sheets , So Build your own Band or Just Play Along with The Piano / full band parts only or MP3's Tracks.( free download link / information provided in the back page of the book ) )Great for Improvisation and event Performances