Question: Who wrote the music for once more with feeling?
Disambiguated questions and answers: question: Who wrote the music for 2006 song once more with feeling?
Who wrote the music for 1970 Willie Nelson song once more with feeling?
Who wrote the music for 1970 Jerry Lee Lewis song once more with feeling?
Who wrote the music for the 2016 documentary once more with feeling?
Who wrote the music for the 2009 film once more with feeling?
Who wrote the music for the Buffy the Vampire Slayer episode once more with feeling?
Who wrote the music for the 1960 movie Once More With Feeling!?
answer: Sam Duckworth
Get Cape. Wear Cape. Fly
Samuel Lloyd "Sam" Duckworth
 Samuel Lloyd Duckworth
Shirley Nelson
Kris Kristofferson and Shel Silverstein
Nick Cave and the Bad Seeds
Paul Hsu
Joss Whedon
Joseph Hill Whedon
Franz Liszt, Ludwig van Beethoven, and Richard Wagner
Natural Questions answer: Joss Whedon (from the Wikipedia article "Once More, with Feeling (Buffy the Vampire Slayer)")