Question

我找到了一些使用aubio获取音高的示例代码，但是我不知道要改变什么来让它以第二个增量显示音高：

import sys 
from aubio import source, pitch, freqtomidi

if len(sys.argv) < 2:
    print "Usage: %s <filename> [samplerate]" % sys.argv[0]
    sys.exit(1)

filename = sys.argv[1]
downsample = 1 
samplerate = 44100 / downsample
if len( sys.argv ) > 2: samplerate = int(sys.argv[2])

win_s = 4096 / downsample # fft size
hop_s = 512  / downsample # hop size


s = source(filename, samplerate, hop_s)
samplerate = s.samplerate

tolerance = 0.8 


pitch_o = pitch("yin", win_s, hop_s, samplerate)
pitch_o.set_tolerance(tolerance)

pitches = []
confidences = []

total_frames = 0 
while True:
    samples, read = s() 
    pitch = pitch_o(samples)[0]
    pitch = int(round(pitch))
    confidence = pitch_o.get_confidence()
    #if confidence < 0.8: pitch = 0.
    print "%f %f %f" % (total_frames / float(samplerate), pitch, confidence)
    pitches += [pitch]
    confidences += [confidence]
    total_frames += read
    if read < hop_s: break

另外，我可以直接从输出而不是wav文件中执行此操作吗？

Answer 1

此脚本（也在aubio/python/demos/demo_pitch.py）提取每个音频帧的音高候选（此处 512./44100 * 1000 = 11.6ms ）。

以秒为单位显示音高

“以秒为单位”是什么意思？每个连续1秒长段的“整体”音高？你可以np.median(pitches)。

每个音符改变后的新音高？您可以处理输出并将类似的音高候选组合成音符。

或直接使用aubionotes。

直接从输出
执行此操作

你的意思是“输出”吗？

另见run aubiopitch continuously on a file descriptor。

请询问您的aubio问题@ https://github.com/aubio/aubio。

如何使用aubio来获取python中一系列音调中每个音调的频率

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