Ukulele music is classed in 787.89 Ukuleles, e.g., Gently Weeps (ukulele music from various traditions, e.g., “While My Guitar Gently Weeps,” “Ave Maria,” “Sakura,” and “Star-Spangled Banner”). For works emphasizing a specific tradition, notation can be added to express the tradition. For example, Blues Ukulele is classed in 787.891643 Blues music for the ukulele (built with 787.89 plus 1 from 11–17 General principles in add table at 784–788 Instruments and their music plus 643 from 781.643 Blues, following footnote instruction at 787.89 and instructions in add table at 784–788). The Beatles for Ukulele is classed in 787.89166 Rock music for the ukulele (built with 787.89 plus 1 from add table at 784–788 plus 66 from 781.66 Rock [Rock 'n' roll]).
Gently Weeps is a sound recording, while Blues Ukulele and The Beatles for Ukulele are music scores. No special notation is used in 780 Music to distinguish sound recordings or music scores themselves (except as an option). Here are the relevant examples of standard DDC numbers given in the Manual entry 780.26 Texts; treatises on music scores and recordings:
Number Used for
787.2 A treatise on violin music
787.2 Violin scores
787.2 Recordings of violin music
Works about techniques for playing the ukulele are classed in 787.89193 Techniques for playing the ukulele (built with 787.89 plus 1 from 18–19 Musical forms and instruments in add table at 784–788 Instruments and their music plus 93 from 784.193 Techniques for playing instruments following footnote instruction at 787.89 and instructions in add table at 784–788). An example is Absolute Beginners. Ukulele.