 Stravinsky used muffled harp chords and notes plucked near the sounding-board in "Symphony of Psalms".Schoenberg used flat-handed chords in his "Variations for Orchestra" (1929) Bartók also used the flat-handed chords in "Music for String Instruments, Percussion, and Celestia" (1936) as well as chromatic octaves.Benjamin Britten's The Young Person's Guide to the Orchestra used all of Salzedo's published harp techniques.