bitPickups/android-audio-recorder
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update fft

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This commit is contained in:
Alexey Kuznetsov 2016-04-04 14:20:24 +03:00
commit b23fd3e3a7
1 changed files with 8 additions and 9 deletions
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17
docs/fft.py
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@ -61,16 +61,15 @@ def real_sound_weave(durationMs):
y = np.zeros(len(x))
y += np.sin(2.0 * np.pi * x / (Fe / float(4500)))
y += 0.5 * np.sin(2.0 * np.pi * x / (Fe / float(4000)))
y += 0.5 * np.sin(2.0 * np.pi * x / (Fe / float(1000)))
y += 0.9 * np.sin(2.0 * np.pi * x / (Fe / float(7500)))
y += 1 * np.sin(2.0 * np.pi * x / (Fe / float(3000)))
wav_max = 0x7fff
y += np.sin(2.0 * np.pi * x / (Fe / float(4500))) * wav_max
y += 0.5 * np.sin(2.0 * np.pi * x / (Fe / float(4000))) * wav_max
y += 0.5 * np.sin(2.0 * np.pi * x / (Fe / float(1000))) * wav_max
y += 0.9 * np.sin(2.0 * np.pi * x / (Fe / float(7500))) * wav_max
y += 1 * np.sin(2.0 * np.pi * x / (Fe / float(3000))) * wav_max
m = np.max(np.abs(y))
y = y * 0x7fff
# y = y / m
y = y / np.max(np.abs(y)) * wav_max
#y = noise(y, 0x7fff)