Log-frequency Spectrum: a spectrum similar to the well-known constant Q spectrum, in which bins are linear in log-frequency.вЂњChromagramвЂќ and вЂњBass ChromagramвЂќ outputs. вЂњChroma and Bass ChromagramвЂќ output will be different from the individual 12-dim.

Note that normalisation implies that the joint 24-dim. If the setting is not вЂnoneвЂ™, then each chroma frame separately is divided by the chosen vector norm.

chroma normalisation (none, maximum norm, L1 norm, L2 norm default: none): determines whether or how the chromagrams are normalised.

Their harmonic amplitude follows a geometrically decreasing pattern, in which the i-th harmonic has an amplitude of ^, where вЂњ^вЂќ means вЂњto the power ofвЂќ.

spectral shape (0.5 - 0.9 default: 0.7): the shape of the notes in the NNLS dictionary.

For values other than 0.0 the log-freq spectral bins are divided by ^, where вЂњ^вЂќ means вЂњto the power ofвЂќ.

spectral whitening (0.0 - 1.0 default: 1.0): determines how much the log-frequency spectrum is whitened.

Local tuning is only advisable when the tuning is likely to change over the audio, for example in podcasts, or in a cappella singing.

tuning mode (global or local default: global): local uses a local average for tuning, global uses all audio frames.

A value of 0 means that no bins will be changed. All bins below the first bin whose cumulative energy exceeds the quantile x will be set to 0. Consider the cumulative energy spectrum (from low to high frequencies).

spectral roll-on (0 % - 5 % default: 0 %): this removes low-frequency noise - useful in quiet recordings.

use approximate transcription (NNLS) (on or off default: on): toggle between NNLS approximate transcription and linear spectral mapping.

spectral shape: (doesn't matter: no NNLS).

use approximate transcription (NNLS): off.use approximate transcription (NNLS): on.The default settings (in brackets, below) are those used for Matthias MauchвЂ™s 2010 MIREX submissions.

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