The bells span four and a half octaves chromatically. Isomorphic graphs have the same chromatic polynomial, but non-isomorphic graphs can be chromatically equivalent. The augmented sixths can be treated as chromatically altered passing chords. The chords are built around the chromatically descending bass line. This is in contrast with instruments like the guitar or banjo, which are fretted chromatically. This allows the instrument to be played chromatically in melody. The song ends, as does the second section, with a short chromatically descending guitar motif. Anton Weidinger developed a keyed trumpet which could play chromatically throughout its entire range. The marimbaphone had shallow steel bars arranged chromatically with a tube resonator under each bar. The modern pan is a chromatically pitched percussion instrument made from 55 gallon industrial drums. The widely published versions are cropped and chromatically adjusted from the original photographs. All cycle graphs are chromatically unique. The lower and upper added notes may or may not be chromatically raised. Males are chromatically more yellow than females. The program allowed Lopatin to write lyrics and play them chromatically.