Module note_seq.midi_synth
MIDI audio synthesis.
Expand source code
# Copyright 2021 The Magenta Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""MIDI audio synthesis."""
from note_seq import midi_io
import numpy as np
def synthesize(sequence, sample_rate, wave=np.sin):
"""Synthesizes audio from a music_pb2.NoteSequence using a waveform.
This uses the pretty_midi `synthesize` method. Sound quality will be lower
than using `fluidsynth` with a good SoundFont.
Args:
sequence: A music_pb2.NoteSequence to synthesize.
sample_rate: An integer audio sampling rate in Hz.
wave: Function that returns a periodic waveform.
Returns:
A 1-D numpy float array containing the synthesized waveform.
"""
midi = midi_io.note_sequence_to_pretty_midi(sequence)
return midi.synthesize(fs=sample_rate, wave=wave)
def fluidsynth(sequence, sample_rate, sf2_path=None):
"""Synthesizes audio from a music_pb2.NoteSequence using FluidSynth.
This uses the pretty_midi `fluidsynth` method. In order to use this synth,
you must have FluidSynth and pyFluidSynth installed.
Args:
sequence: A music_pb2.NoteSequence to synthesize.
sample_rate: An integer audio sampling rate in Hz.
sf2_path: A string path to a SoundFont. If None, uses the TimGM6mb.sf2 file
included with pretty_midi.
Returns:
A 1-D numpy float array containing the synthesized waveform.
"""
midi = midi_io.note_sequence_to_pretty_midi(sequence)
return midi.fluidsynth(fs=sample_rate, sf2_path=sf2_path)
Functions
def fluidsynth(sequence, sample_rate, sf2_path=None)
-
Synthesizes audio from a music_pb2.NoteSequence using FluidSynth.
This uses the pretty_midi
fluidsynth()
method. In order to use this synth, you must have FluidSynth and pyFluidSynth installed.Args
sequence
- A music_pb2.NoteSequence to synthesize.
sample_rate
- An integer audio sampling rate in Hz.
sf2_path
- A string path to a SoundFont. If None, uses the TimGM6mb.sf2 file included with pretty_midi.
Returns
A 1-D numpy float array containing the synthesized waveform.
Expand source code
def fluidsynth(sequence, sample_rate, sf2_path=None): """Synthesizes audio from a music_pb2.NoteSequence using FluidSynth. This uses the pretty_midi `fluidsynth` method. In order to use this synth, you must have FluidSynth and pyFluidSynth installed. Args: sequence: A music_pb2.NoteSequence to synthesize. sample_rate: An integer audio sampling rate in Hz. sf2_path: A string path to a SoundFont. If None, uses the TimGM6mb.sf2 file included with pretty_midi. Returns: A 1-D numpy float array containing the synthesized waveform. """ midi = midi_io.note_sequence_to_pretty_midi(sequence) return midi.fluidsynth(fs=sample_rate, sf2_path=sf2_path)
def synthesize(sequence, sample_rate, wave=<ufunc 'sin'>)
-
Synthesizes audio from a music_pb2.NoteSequence using a waveform.
This uses the pretty_midi
synthesize()
method. Sound quality will be lower than usingfluidsynth()
with a good SoundFont.Args
sequence
- A music_pb2.NoteSequence to synthesize.
sample_rate
- An integer audio sampling rate in Hz.
wave
- Function that returns a periodic waveform.
Returns
A 1-D numpy float array containing the synthesized waveform.
Expand source code
def synthesize(sequence, sample_rate, wave=np.sin): """Synthesizes audio from a music_pb2.NoteSequence using a waveform. This uses the pretty_midi `synthesize` method. Sound quality will be lower than using `fluidsynth` with a good SoundFont. Args: sequence: A music_pb2.NoteSequence to synthesize. sample_rate: An integer audio sampling rate in Hz. wave: Function that returns a periodic waveform. Returns: A 1-D numpy float array containing the synthesized waveform. """ midi = midi_io.note_sequence_to_pretty_midi(sequence) return midi.synthesize(fs=sample_rate, wave=wave)