source: python/demos/demo_pyaudio.py @ e7da8ba

feature/autosinkfeature/cnnfeature/cnn_orgfeature/constantqfeature/crepefeature/crepe_orgfeature/pitchshiftfeature/pydocstringsfeature/timestretchfix/ffmpeg5sampleryinfft+
Last change on this file since e7da8ba was e7da8ba, checked in by Paul Brossier <piem@piem.org>, 7 years ago

python/demos/demo_pyaudio.py: added simple demo for pyaudio, see #6, closes #78, thanks to @jhoelzl and @notalentgeek

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1#! /usr/bin/env python
2
3import pyaudio
4import sys
5import numpy as np
6from aubio import pitch, sink
7
8# initialise pyaudio
9p = pyaudio.PyAudio()
10
11# open stream
12buffer_size = 1024
13pyaudio_format = pyaudio.paFloat32
14n_channels = 1
15samplerate = 44100
16stream = p.open(format=pyaudio_format,
17                channels=n_channels,
18                rate=samplerate,
19                input=True,
20                frames_per_buffer=buffer_size)
21
22if 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
28else:
29    # run forever
30    outputsink = None
31    record_duration = None
32
33# setup pitch
34tolerance = 0.8
35win_s = 4096 # fft size
36hop_s = buffer_size # hop size
37pitch_o = pitch("default", win_s, hop_s, samplerate)
38pitch_o.set_unit("midi")
39pitch_o.set_tolerance(tolerance)
40
41print("*** starting recording")
42while 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
63print("*** done recording")
64stream.stop_stream()
65stream.close()
66p.terminate()
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