Error when running to Transcribe Audio

[yueyin85]

ImportError Traceback (most recent call last) in () 22 23 note_seq.play_sequence(est_ns, synth=note_seq.fluidsynth, ---> 24 sample_rate=SAMPLE_RATE, sf2_path=SF2_PATH) 25 note_seq.plot_sequence(est_ns)

4 frames /usr/local/lib/python3.7/dist-packages/pretty_midi/instrument.py in fluidsynth(self, fs, sf2_path) 454 455 if not _HAS_FLUIDSYNTH: --> 456 raise ImportError("fluidsynth() was called but pyfluidsynth " 457 "is not installed.") 458

ImportError: fluidsynth() was called but pyfluidsynth is not installed.

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