Don't make the overlap a parameter, it's too fiddly to handle. Just choose the smallest step size that gives an integral input-frames-per-output-bin
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Chris Cannam |
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Wed, 12 Mar 2014 12:01:54 +0000 |
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4a777e3b515e |
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Chris@7
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1
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2 Low-frequency spectrogram
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3 =========================
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4
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5 This is a Vamp plugin that produces a spectrogram from only the
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6 low-frequency content of a signal.
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7
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8 You supply a frequency range and a number of bins, and it returns a
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9 magnitude spectrum containing the requested number of bins, spanning
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10 the frequency range you asked for. It does this by first downsampling
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11 the signal to an integer multiple of the maximum requested frequency,
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12 then calculating a Hann-windowed FFT of an appropriate size and
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13 returning a subset of its magnitudes.
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14
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15 Chris Cannam, March 2014
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