Variable audio is not declared or defined before use in Quickstart Guide code.

[NyongCho]

In line 10 of the Quickstart Guide:
sf.write(f"{prompt}.wav", audio, samplerate=16000)

The variable audio is used but never declared or defined. To fix this, it should be replaced with the variable music, which is the return value of model.generate(prompt).

So, the corrected line should be:
sf.write(f"{prompt}.wav", music, samplerate=16000)