Spomo is a mouth organ with a harmonica-style mouthpiece. Each of the blow holes in the mouthpiece leads to a plastic flex-pipe, which in turn leads to a stopped pipe tuned to the appropriate note. Two versions of the instrument are shown here, one with twelve pipes tuned diatonically and one with thirty-one tuned chromatically. The smaller one uses cheap plastic slide whistles tuned by gluing the stopper in place for the intended note. The larger one uses mouthpieces taken from Flutophones, which are inexpensive plastic recorder-style instruments made by the Trophy company, attached to stopped pipes of varying lengths.
In the recording, the 31-note spomo is joined by the cubist bass and a shaker.