1 | NAME |
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2 | aubiomfcc - a command line tool to compute Mel-Frequency Cepstrum Coefficients |
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3 | |
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4 | SYNOPSIS |
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5 | |
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6 | aubiomfcc source |
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7 | aubiomfcc [[-i] source] |
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8 | [-r rate] [-B win] [-H hop] |
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9 | [-T time-format] |
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10 | [-v] [-h] |
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11 | |
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12 | DESCRIPTION |
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13 | |
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14 | aubiomfcc compute the Mel-Frequency Cepstrum Coefficients (MFCC). |
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15 | |
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16 | MFCCs are coefficients that make up for the mel-frequency spectrum, a |
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17 | representation of the short-term power spectrum of a sound. By default, 13 |
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18 | coefficents are computed using 40 filters. |
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19 | |
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20 | When started with an input source (-i/--input), the coefficients are given on |
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21 | the console, prefixed by their timestamps in seconds. |
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22 | |
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23 | OPTIONS |
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24 | |
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25 | This program follows the usual GNU command line syntax, with long options |
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26 | starting with two dashes (--). A summary of options is included below. |
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27 | |
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28 | -i, --input source Run analysis on this audio file. Most uncompressed and |
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29 | compressed are supported, depending on how aubio was built. |
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30 | |
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31 | -r, --samplerate rate Fetch the input source, resampled at the given |
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32 | sampling rate. The rate should be specified in Hertz as an integer. If 0, |
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33 | the sampling rate of the original source will be used. Defaults to 0. |
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34 | |
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35 | -B, --bufsize win The size of the buffer to analyze, that is the length |
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36 | of the window used for spectral and temporal computations. Defaults to 512. |
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37 | |
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38 | -H, --hopsize hop The number of samples between two consecutive analysis. |
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39 | Defaults to 256. |
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40 | |
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41 | -T, --timeformat format Set time format (samples, ms, seconds). Defaults to |
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42 | seconds. |
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43 | |
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44 | -h, --help Print a short help message and exit. |
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45 | |
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46 | -v, --verbose Be verbose. |
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47 | |
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48 | REFERENCES |
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49 | |
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50 | Using the default parameters, the filter coefficients will be computed |
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51 | according to Malcolm Slaney's Auditory Toolbox, available at the following |
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52 | url: |
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53 | |
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54 | http://cobweb.ecn.purdue.edu/~malcolm/interval/1998-010/ (see file mfcc.m) |
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55 | |
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56 | SEE ALSO |
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57 | |
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58 | aubioonset(1), |
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59 | aubiopitch(1), |
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60 | aubiotrack(1), |
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61 | aubionotes(1), |
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62 | aubioquiet(1), |
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63 | and |
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64 | aubiocut(1). |
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65 | |
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66 | AUTHOR |
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67 | |
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68 | This manual page was written by Paul Brossier <piem@aubio.org>. Permission is |
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69 | granted to copy, distribute and/or modify this document under the terms of |
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70 | the GNU General Public License as published by the Free Software Foundation, |
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71 | either version 3 of the License, or (at your option) any later version. |
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