Double Bass SKU: HU.MMCK01B Strings, Methods. Encore On Strings - Music Maestros 1 Double Bass. Softcover Book and CD. Hal Leonard Australia #MMCK01B. Published by Hal Leonard Australia (HU.MMCK01B). 11.8 x 9.1 x 0.1 inches. This is the first book in a series which has been specifically developed to meet the needs of beginner string students aged 7-12. Contemporary, vibrant, creative, engaging and comprehensive each piece features a particular teaching point such as introducing a new note, a new skill or perhaps reinforcing previous elements within a new context. To assist both teacher and student the teaching point relevant to that piece then appears underneath its title.