Juri Seo’s Wah is scored for up to five differently pitched “wah-wah tubes.” These are aluminum tubular bells that produce long-lasting tones rich in harmonics, with small holes that allow for manipulation of the sound. Wah comprises six sections framed by an introduction and coda, and each section has a group of repeated rhythmic cells, which are sometimes played in tag-team manner and sometimes in unison. Wah is one work in a series of compositions by Seo called the “Portable Percussion Project.” Her other pieces in this collection include Four (for four flexitones), Shui (for six water crotales), and Triangle Trio (for triangle, castanets, and tambourine).

– Bruce Perry