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chordsdetection​

chordsdetection(
    @hopsize 2048
    @samplerate 44100
    @windowsize 2
    @mode 0
) -> llll

Generates an audio descriptor to perform chord estimation on a buffer.

The resulting buffer will be updated with the following keys:

  • chordsdetection
info

chordsdetection is a mirror implementation of the same algorithm in the Essentia library. For more details on the algorithm, please check the Essentia Algorithms reference.

Arguments​

  • @hopsize [int]: the hop size with which the input PCPs were computed (default: 2048).
  • @samplerate [float]: the sampling rate of the audio signal [Hz] (default: 44100).
  • @windowsize [float]: the size of the window on which to estimate the chords [s] (default: 2).
  • @mode [int]: Analysis mode. (default: 0).
    • 0: Global
    • 1: Time series
    • 2: Time-tagged time series

Output​

Chordsdetection descriptor [llll]

Usage​

chordsdetection is meant to be used with the analyze function:

$buffer = importaudio('singing.wav'); ## input buffer
$descr = chordsdetection(); ## generate chordsdetection audio descriptor
$buffer.view('before analysis');
$buffer = $buffer.analyze($descr); ## apply analysis
$buffer.view('after analysis')