質問編集履歴
1
ソースコードが読み込めない形式になっていたので変更しました。ご指摘ありがとうございます。
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@@ -12,87 +12,99 @@
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### 該当のソースコード
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```python
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import wav
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import numpy
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freq = 500
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low = 500
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numch = wf.getnchannels() #チャンネル数
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samplewidth = wf.getsampwidth()
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wf = wave.open("sword-slash.wav", "rb")
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numsamples = wf.getnframes() #フレーム数
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numch = wf.getnchannels() #チャンネル数
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samplewidth = wf.getsampwidth()
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samplerate = wf.getframerate() #サンプリング周波数
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numsamples = wf.getnframes() #フレーム数
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buf = wf.readframes(wf.getnframes())
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wf.close()
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data = numpy.frombuffer(buf, dtype='int16')
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after = numpy.zeros(numsamples, dtype='int16')
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elif samplewidth == 4:
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data = numpy.frombuffer(buf, dtype='int32')
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after = numpy.zeros(numsamples, dtype='int32')
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//配列に格納
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if samplewidth == 2:
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data = numpy.frombuffer(buf, dtype='int16')
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after = numpy.zeros(numsamples, dtype='int16')
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if samplewidth == 4:
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data = numpy.frombuffer(buf, dtype='int32')
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after = numpy.zeros(numsamples, dtype='int32')
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N = numsamples
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start = 0
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G = numpy.fft.fft(data[start:start+N])
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#G = abs(G)
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flist = numpy.fft.fftfreq(N, d=1/samplerate)
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G_roll = numpy.roll(flist, freq) #freq = 音の高さのパラメータ(音の高さを高くしたい)
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G_roll[flist > low] = 0 #ローパスのパラメータ(lowより大きい周波数は0にしたい)
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after = numpy.fft.ifft(G)
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ww = wave.open("sample2.wav", "wb")
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ww.setnchannels(numch)
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ww.setsampwidth(samplewidth)
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ww.setframerate(samplerate)
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ww.setnframes(numsamples)
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ww.writeframes(after)
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```
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