Harmonic Fantasy No. 7 is pure overtone music. Throughout the piece, only overtones that support the harmony of the immediate context are used. The opening section uses only the sixteenth and higher harmonic partials, four octaves above the fundamental, and the second uses partials from the eighth and above, three octaves above the fundamental. Nevertheless, the harmony of these passages is clear because of the partials used. Fundamentals start to appear just before two minutes and remain from then on. Initially, overtones are faded in and out in the manner of a complex envelope, but three minutes into the piece they begin to be attacked individually. A climax is reached at about 5 and a half minutes, when the fading instrument returns. The piece was written in 2023 and synthesized by Csound.