Mercurial > hg > lowfreq
annotate README @ 11:ccb271dd0b84 tip
More sensible defaults
| author | Chris Cannam |
|---|---|
| date | Wed, 12 Mar 2014 13:23:29 +0000 |
| parents | 4a777e3b515e |
| children |
| rev | line source |
|---|---|
| Chris@7 | 1 |
| Chris@7 | 2 Low-frequency spectrogram |
| Chris@7 | 3 ========================= |
| Chris@7 | 4 |
| Chris@7 | 5 This is a Vamp plugin that produces a spectrogram from only the |
| Chris@7 | 6 low-frequency content of a signal. |
| Chris@7 | 7 |
| Chris@7 | 8 You supply a frequency range and a number of bins, and it returns a |
| Chris@7 | 9 magnitude spectrum containing the requested number of bins, spanning |
| Chris@7 | 10 the frequency range you asked for. It does this by first downsampling |
| Chris@7 | 11 the signal to an integer multiple of the maximum requested frequency, |
| Chris@7 | 12 then calculating a Hann-windowed FFT of an appropriate size and |
| Chris@7 | 13 returning a subset of its magnitudes. |
| Chris@7 | 14 |
| Chris@7 | 15 Chris Cannam, March 2014 |