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| 1 | +#! /usr/bin/env python | |
| 2 | + | |
| 3 | +import pyaudio | |
| 4 | +import sys | |
| 5 | +import numpy as np | |
| 6 | +from aubio import pitch, sink | |
| 7 | + | |
| 8 | +# initialise pyaudio | |
| 9 | +p = pyaudio.PyAudio() | |
| 10 | + | |
| 11 | +# open stream | |
| 12 | +buffer_size = 1024 | |
| 13 | +pyaudio_format = pyaudio.paFloat32 | |
| 14 | +n_channels = 1 | |
| 15 | +samplerate = 44100 | |
| 16 | +stream = p.open(format=pyaudio_format, | |
| 17 | + channels=n_channels, | |
| 18 | + rate=samplerate, | |
| 19 | + input=True, | |
| 20 | + frames_per_buffer=buffer_size) | |
| 21 | + | |
| 22 | +if len(sys.argv) > 1: | |
| 23 | + # record 5 seconds | |
| 24 | + output_filename = sys.argv[1] | |
| 25 | + record_duration = 5 # exit 1 | |
| 26 | + outputsink = sink(sys.argv[1], samplerate) | |
| 27 | + total_frames = 0 | |
| 28 | +else: | |
| 29 | + # run forever | |
| 30 | + outputsink = None | |
| 31 | + record_duration = None | |
| 32 | + | |
| 33 | +# setup pitch | |
| 34 | +tolerance = 0.8 | |
| 35 | +win_s = 4096 # fft size | |
| 36 | +hop_s = buffer_size # hop size | |
| 37 | +pitch_o = pitch("default", win_s, hop_s, samplerate) | |
| 38 | +pitch_o.set_unit("midi") | |
| 39 | +pitch_o.set_tolerance(tolerance) | |
| 40 | + | |
| 41 | +print("*** starting recording") | |
| 42 | +while True: | |
| 43 | + try: | |
| 44 | + audiobuffer = stream.read(buffer_size) | |
| 45 | + signal = np.fromstring(audiobuffer, dtype=np.float32) | |
| 46 | + | |
| 47 | + pitch = pitch_o(signal)[0] | |
| 48 | + confidence = pitch_o.get_confidence() | |
| 49 | + | |
| 50 | + print("{} / {}".format(pitch,confidence)) | |
| 51 | + | |
| 52 | + if outputsink: | |
| 53 | + outputsink(signal, len(signal)) | |
| 54 | + | |
| 55 | + if record_duration: | |
| 56 | + total_frames += len(signal) | |
| 57 | + if record_duration * samplerate < total_frames: | |
| 58 | + break | |
| 59 | + except KeyboardInterrupt: | |
| 60 | + print("*** Ctrl+C pressed, exiting") | |
| 61 | + break | |
| 62 | + | |
| 63 | +print("*** done recording") | |
| 64 | +stream.stop_stream() | |
| 65 | +stream.close() | |
| 66 | +p.terminate() | |