Excelcia Music Publishing reported that horn in F and tuba method books have joined Peter Sciaino’s Two Chord Jams collection. The additions expand the instrumental parts available for the jazz improvisation resource.

The collection contains 12 original tunes, each built around two chords. Excelcia says the material is intended for beginning improvisers working in small groups or larger ensembles. Each selection includes a melody, chord symbols, background figures and suggested scales.

The horn and tuba books are listed at $9.99 each. The publisher also lists parts for flute, saxophones, trumpet and clarinet, trombone and euphonium, and rhythm section. The score is listed at $24.99, and accompaniment tracks can be downloaded.

In an October 27 announcement, Excelcia highlighted the new parts for horn and tuba players. The two-chord structure lets students concentrate on listening, groove and phrasing as they develop their improvisation skills. The collection is designed for uses including ensemble practice, warmups and performance, according to the publisher.

For more information, visit excelciamusic.com.