raspberry pi 3 でstretch その15

#概要
raspberry pi 3 でstretchやってみた。
pythonでmidi再生やってみた。

#環境
Raspberry Pi 3 model B v1.2 element14
2017-09-07-raspbian-stretch

#インストール
sudo aptitude install python-pyaudio
sudo pip install softsynth

#サンプルコード

import sys
import argparse
from synth.synthesizer import Synthesizer
from synth.wave_writer import WaveWriter
from synth.options import Options
from synth import stream
from synth.instruments.OvertoneInstrument import OvertoneInstrument
from synth.note_envelopes import MidiTrackNoteEnvelope

def profile_call():
	opts = Options()
	instr = OvertoneInstrument(opts, ArpeggioNoteEnvelope())
	input = instr
	input.get_samples_in_byte_rate(44100)

def profile(opts):
	if opts.profile_application:
		import cProfile
		import pstats
		cProfile.run('profile_call()', 'restats')
		p = pstats.Stats('restats')
		p.strip_dirs().sort_stats('time').print_stats()
		sys.exit(0)

def get_args():
	parser = argparse.ArgumentParser(prog = 'synth', description = 'Programmable synth')
	parser.add_argument('input', metavar = 'INPUT', nargs=1, help = 'the input file path')
	parser.add_argument('output', metavar = 'OUTPUT', nargs='?', help = 'the optional output file path. Default is INPUT.wav')
	parser.add_argument('--bpm', '-b')
	parser.add_argument('-w', '--wave', action = 'store_true', help = 'Output wave file.')
	parser.add_argument('--profile', action = 'store_true', help = 'Profile the application to find hot spots.')
	parser.add_argument('--stdout', action = 'store_true', help = 'Also write PCM data to stdout. Only valid in conjunction with the --wave flag.')
	args = parser.parse_args()
	opts = Options(args.input[0], args.output, args.bpm)
	opts.write_wave = args.wave
	opts.write_wave_to_stdout = args.stdout
	opts.profile_application = args.profile
	return opts

def main():
	opts = get_args()
	synth = Synthesizer(opts).load_from_midi(opts.input)
	profile(opts)
	wave = None
	if stream.PYAUDIO and not opts.write_wave:
		stream.stream_to_pyaudio(opts, synth)
	else: 
		WaveWriter(opts).output(synth)

if __name__ == '__main__':
	main()

#実行
python synth.py -b 120 test1.mid

以上。