I recently caught this 1947 movie with Dana Andrews, Merle Oberon and Hoagy on TCM and was pleasantly surprised to hear Bix mentioned (although maybe I vaguely remember reading of it somewhere; perhaps here!), and was especially surprised to hear the comment coming from Merle, rather than Hoagy.
Merle played a socialite pianist, steeped in classical music, but who admitted to Dana that she enjoyed Louis, Duke and Bix, especially as a pianist.
It made me wonder if Hoagy suggested the line while they were filming.
Night Song was mentioned here.
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