10:40 我想問為什麼這個樂章第一次呈示部是G大調轉C大調？雖然整個協奏曲是標G大調，第二樂章開頭五小節收在大G和弦，但譜號是C大調、樂章開頭是大C和弦，第一次呈示部樂團結尾也是在大C和弦。維基百科也寫第二樂章是C大調。另外我找到的舊金山交響樂團的樂曲介紹說是C大調，只是塞了F#。以下引述，寫得挺有趣的： Now, to begin the Andante, Mozart reverses the harmonic process with which he had opened the first movement. There F‑naturals had unexpectedly darkened the G major beginning. This time Mozart starts plainly enough in C major, but within a few seconds, certainly before we have had a chance to register a sense of harmonic “place,” piquant and startling F‑sharps cast doubt. It is as though the C major harmony of the first measure were just a subsidiary event in what is really to be a movement in G major. The opening phrase-an asymmetrical one of five measures!-makes a cadence on G, and, further to blur any certainty we might feel, Mozart follows it with an immeasured silence. Only after the music resumes with an exquisite choreography for intertwined woodwinds do we feel sure that what we first heard-C major-was right after all.(www.sfsymphony.org/Data/Event-Data/Program-Notes/M/Mozart-Piano-Concerto-No-17-in-G-major ) 順帶一提，應該是現代音樂聽太多，對我來說第二樂章開頭用的F# 沒有模糊C大調的感覺，反而比較像C Lydian 。縱使我相信莫札特是想在C大調裡面做一個G大調的感覺。
