I thought about this when a friend asked me to write a piece that he could use to help his students ease into the idea of singing and playing at the same time. I called the piece "On Such a Winter's Day" because it uses the basso ostinato from "California Dreamin" in the voice. I also thought of it while I was out walking on a cold November day. Until I heard this performance in February, I could only hear the piece (as played by me) with the vocal line being very close to the flute line, where it creates all kinds of interesting difference tones and extra-harmonic material. Keith Wright, the flutist in this performance, sings in a baritone register, making the resulting overtones very different from the ones I get. I actually prefer it with a male-register voice because of the contrast between the "pure" flute material (with polyphonic stuff written the "traditional" way by using fast arpeggios) and the vocal polyphony.