Analysis Descriptor Documentation

Contents

Analysis Settings

The analysis sample rate is 44100Hz and the audio file’s channels are mixed down to mono. For the lowlevel namespace the frame size is 2048 samples with a hop size of 1024, while for the tonal namespace the frame size is 4096 and the hop size 2048.

Acronyms for the statistics

Generally, the lowlevel descriptors have the statistics mean, max, min, var, dmean, dmean2, dvar, and dvar2. These should be read as follows.

Statistic  
mean The arithmetic mean
max The maximum value
min The minimum value
var The variance
dmean The mean of the derivative
dmean2 The mean of the second derivative
dvar The variance of the derivative
dvar2 The variance of the second derivative

Metadata Descriptors

metadata.version

curl https://freesound.org/api/sounds/<sound_id>/analysis/metadata/version

Lowlevel Descriptors

lowlevel.spectral_complexity

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/spectral_complexity

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_SpectralComplexity.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/lowlevel.spectral_complexity.mean.png

lowlevel.silence_rate_20dB

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/silence_rate_20dB

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_SilenceRate.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/lowlevel.silence_rate_20dB.mean.png

lowlevel.erb_bands

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/erb_bands

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_ERBBands.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/lowlevel.erb_bands.mean.000.png _images/lowlevel.erb_bands.mean.001.png _images/lowlevel.erb_bands.mean.002.png _images/lowlevel.erb_bands.mean.003.png _images/lowlevel.erb_bands.mean.004.png _images/lowlevel.erb_bands.mean.005.png _images/lowlevel.erb_bands.mean.006.png _images/lowlevel.erb_bands.mean.007.png _images/lowlevel.erb_bands.mean.008.png _images/lowlevel.erb_bands.mean.009.png _images/lowlevel.erb_bands.mean.010.png _images/lowlevel.erb_bands.mean.011.png _images/lowlevel.erb_bands.mean.012.png _images/lowlevel.erb_bands.mean.013.png _images/lowlevel.erb_bands.mean.014.png _images/lowlevel.erb_bands.mean.015.png _images/lowlevel.erb_bands.mean.016.png _images/lowlevel.erb_bands.mean.017.png

lowlevel.average_loudness

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/average_loudness

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_Loudness.html
_images/lowlevel.average_loudness.png

lowlevel.spectral_rms

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/spectral_rms

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_RMS.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/lowlevel.spectral_rms.mean.png

lowlevel.spectral_kurtosis

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/spectral_kurtosis

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_CentralMoments.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/lowlevel.spectral_kurtosis.mean.png

lowlevel.barkbands_kurtosis

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/barkbands_kurtosis

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_CentralMoments.html

Stats:

/min
/max
/dmean2
/dmean
/var
/mean

Distribution in Freesound

_images/lowlevel.barkbands_kurtosis.mean.png

lowlevel.scvalleys

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/scvalleys

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_SpectralContrast.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/lowlevel.scvalleys.mean.000.png _images/lowlevel.scvalleys.mean.001.png _images/lowlevel.scvalleys.mean.002.png _images/lowlevel.scvalleys.mean.003.png _images/lowlevel.scvalleys.mean.004.png _images/lowlevel.scvalleys.mean.005.png

lowlevel.spectral_spread

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/spectral_spread

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_CentralMoments.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/lowlevel.spectral_spread.mean.png

lowlevel.pitch

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/pitch

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_PitchYinFFT.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/lowlevel.pitch.mean.png

lowlevel.dissonance

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/dissonance

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_Dissonance.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/lowlevel.dissonance.mean.png

lowlevel.spectral_energyband_high

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/spectral_energyband_high

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_EnergyBand.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/lowlevel.spectral_energyband_high.mean.png

lowlevel.gfcc

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/gfcc

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_GFCC.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/lowlevel.gfcc.mean.000.png _images/lowlevel.gfcc.mean.001.png _images/lowlevel.gfcc.mean.002.png _images/lowlevel.gfcc.mean.003.png _images/lowlevel.gfcc.mean.004.png _images/lowlevel.gfcc.mean.005.png _images/lowlevel.gfcc.mean.006.png _images/lowlevel.gfcc.mean.007.png _images/lowlevel.gfcc.mean.008.png _images/lowlevel.gfcc.mean.009.png _images/lowlevel.gfcc.mean.010.png _images/lowlevel.gfcc.mean.011.png _images/lowlevel.gfcc.mean.012.png

lowlevel.spectral_flux

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/spectral_flux

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_Flux.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/lowlevel.spectral_flux.mean.png

lowlevel.silence_rate_30dB

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/silence_rate_30dB

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_SilenceRate.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/lowlevel.silence_rate_30dB.mean.png

lowlevel.spectral_contrast

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/spectral_contrast

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_SpectralContrast.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/lowlevel.spectral_contrast.mean.000.png _images/lowlevel.spectral_contrast.mean.001.png _images/lowlevel.spectral_contrast.mean.002.png _images/lowlevel.spectral_contrast.mean.003.png _images/lowlevel.spectral_contrast.mean.004.png _images/lowlevel.spectral_contrast.mean.005.png

lowlevel.spectral_energyband_middle_high

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/spectral_energyband_middle_high

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_EnergyBand.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/lowlevel.spectral_energyband_middle_high.mean.png

lowlevel.barkbands_spread

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/barkbands_spread

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_CentralMoments.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/lowlevel.barkbands_spread.mean.png

lowlevel.spectral_centroid

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/spectral_centroid

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_Centroid.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/lowlevel.spectral_centroid.mean.png

lowlevel.pitch_salience

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/pitch_salience

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_PitchSalience.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/lowlevel.pitch_salience.mean.png

lowlevel.silence_rate_60dB

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/silence_rate_60dB

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_SilenceRate.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/lowlevel.silence_rate_60dB.mean.png

lowlevel.spectral_entropy

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/spectral_entropy

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_Entropy.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/lowlevel.spectral_entropy.mean.png

lowlevel.spectral_rolloff

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/spectral_rolloff

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_RollOff.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/lowlevel.spectral_rolloff.mean.png

lowlevel.barkbands

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/barkbands

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_BarkBands.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/lowlevel.barkbands.mean.000.png _images/lowlevel.barkbands.mean.001.png _images/lowlevel.barkbands.mean.002.png _images/lowlevel.barkbands.mean.003.png _images/lowlevel.barkbands.mean.004.png _images/lowlevel.barkbands.mean.005.png _images/lowlevel.barkbands.mean.006.png _images/lowlevel.barkbands.mean.007.png _images/lowlevel.barkbands.mean.008.png _images/lowlevel.barkbands.mean.009.png _images/lowlevel.barkbands.mean.010.png _images/lowlevel.barkbands.mean.011.png _images/lowlevel.barkbands.mean.012.png _images/lowlevel.barkbands.mean.013.png _images/lowlevel.barkbands.mean.014.png _images/lowlevel.barkbands.mean.015.png _images/lowlevel.barkbands.mean.016.png _images/lowlevel.barkbands.mean.017.png _images/lowlevel.barkbands.mean.018.png _images/lowlevel.barkbands.mean.019.png _images/lowlevel.barkbands.mean.020.png _images/lowlevel.barkbands.mean.021.png _images/lowlevel.barkbands.mean.022.png _images/lowlevel.barkbands.mean.023.png _images/lowlevel.barkbands.mean.024.png _images/lowlevel.barkbands.mean.025.png _images/lowlevel.barkbands.mean.026.png

lowlevel.spectral_energyband_low

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/spectral_energyband_low

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_EnergyBand.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/lowlevel.spectral_energyband_low.mean.png

lowlevel.barkbands_skewness

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/barkbands_skewness

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_CentralMoments.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/lowlevel.barkbands_skewness.mean.png

lowlevel.pitch_instantaneous_confidence

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/pitch_instantaneous_confidence

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_PitchYinFFT.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/lowlevel.pitch_instantaneous_confidence.mean.png

lowlevel.spectral_energyband_middle_low

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/spectral_energyband_middle_low

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_EnergyBand.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/lowlevel.spectral_energyband_middle_low.mean.png

lowlevel.spectral_strongpeak

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/spectral_strongpeak

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_StrongPeak.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/lowlevel.spectral_strongpeak.mean.png

lowlevel.startFrame

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/startFrame

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_StartStopSilence.html
_images/lowlevel.startFrame.png

lowlevel.spectral_decrease

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/spectral_decrease

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_Decrease.html

Stats:

/dmean2
/dmean
/mean
/max
/min

Distribution in Freesound

_images/lowlevel.spectral_decrease.mean.png

lowlevel.stopFrame

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/stopFrame

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_StartStopSilence.html
_images/lowlevel.stopFrame.png

lowlevel.mfcc

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/mfcc

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_MFCC.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/lowlevel.mfcc.mean.000.png _images/lowlevel.mfcc.mean.001.png _images/lowlevel.mfcc.mean.002.png _images/lowlevel.mfcc.mean.003.png _images/lowlevel.mfcc.mean.004.png _images/lowlevel.mfcc.mean.005.png _images/lowlevel.mfcc.mean.006.png _images/lowlevel.mfcc.mean.007.png _images/lowlevel.mfcc.mean.008.png _images/lowlevel.mfcc.mean.009.png _images/lowlevel.mfcc.mean.010.png _images/lowlevel.mfcc.mean.011.png _images/lowlevel.mfcc.mean.012.png

lowlevel.spectral_energy

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/spectral_energy

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_Energy.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/lowlevel.spectral_energy.mean.png

lowlevel.spectral_flatness_db

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/spectral_flatness_db

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_FlatnessDB.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/lowlevel.spectral_flatness_db.mean.png

lowlevel.frequency_bands

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/frequency_bands

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_FrequencyBands.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/lowlevel.frequency_bands.mean.000.png _images/lowlevel.frequency_bands.mean.001.png _images/lowlevel.frequency_bands.mean.002.png _images/lowlevel.frequency_bands.mean.003.png _images/lowlevel.frequency_bands.mean.004.png _images/lowlevel.frequency_bands.mean.005.png _images/lowlevel.frequency_bands.mean.006.png _images/lowlevel.frequency_bands.mean.007.png _images/lowlevel.frequency_bands.mean.008.png _images/lowlevel.frequency_bands.mean.009.png _images/lowlevel.frequency_bands.mean.010.png _images/lowlevel.frequency_bands.mean.011.png _images/lowlevel.frequency_bands.mean.012.png _images/lowlevel.frequency_bands.mean.013.png _images/lowlevel.frequency_bands.mean.014.png _images/lowlevel.frequency_bands.mean.015.png _images/lowlevel.frequency_bands.mean.016.png _images/lowlevel.frequency_bands.mean.017.png _images/lowlevel.frequency_bands.mean.018.png _images/lowlevel.frequency_bands.mean.019.png _images/lowlevel.frequency_bands.mean.020.png _images/lowlevel.frequency_bands.mean.021.png _images/lowlevel.frequency_bands.mean.022.png _images/lowlevel.frequency_bands.mean.023.png _images/lowlevel.frequency_bands.mean.024.png _images/lowlevel.frequency_bands.mean.025.png _images/lowlevel.frequency_bands.mean.026.png _images/lowlevel.frequency_bands.mean.027.png

lowlevel.zerocrossingrate

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/zerocrossingrate

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_ZeroCrossingRate.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/lowlevel.zerocrossingrate.mean.png

lowlevel.spectral_skewness

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/spectral_skewness

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_CentralMoments.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/lowlevel.spectral_skewness.mean.png

lowlevel.hfc

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/hfc

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_HFC.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/lowlevel.hfc.mean.png

lowlevel.spectral_crest

curl https://freesound.org/api/sounds/<sound_id>/analysis/lowlevel/spectral_crest

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_Crest.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/lowlevel.spectral_crest.mean.png

Rhythm Descriptors

rhythm.first_peak_bpm

curl https://freesound.org/api/sounds/<sound_id>/analysis/rhythm/first_peak_bpm

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_BpmHistogramDescriptors.html

Stats:

/max
/min
/mean

Distribution in Freesound

_images/rhythm.first_peak_bpm.mean.png

rhythm.onset_times

curl https://freesound.org/api/sounds/<sound_id>/analysis/rhythm/onset_times

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_OnsetRate.html

rhythm.beats_count

curl https://freesound.org/api/sounds/<sound_id>/analysis/rhythm/beats_count

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_RhythmExtractor2013.html
_images/rhythm.beats_count.png

rhythm.beats_loudness

curl https://freesound.org/api/sounds/<sound_id>/analysis/rhythm/beats_loudness

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_BeatsLoudness.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/rhythm.beats_loudness.mean.png

rhythm.first_peak_spread

curl https://freesound.org/api/sounds/<sound_id>/analysis/rhythm/first_peak_spread

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_BpmHistogramDescriptors.html

Stats:

/max
/min
/mean

Distribution in Freesound

_images/rhythm.first_peak_spread.mean.png

rhythm.second_peak_weight

curl https://freesound.org/api/sounds/<sound_id>/analysis/rhythm/second_peak_weight

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_BpmHistogramDescriptors.html

Stats:

/max
/min
/mean

Distribution in Freesound

_images/rhythm.second_peak_weight.mean.png

rhythm.bpm

curl https://freesound.org/api/sounds/<sound_id>/analysis/rhythm/bpm

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_RhythmExtractor2013.html
_images/rhythm.bpm.png

rhythm.bpm_intervals

curl https://freesound.org/api/sounds/<sound_id>/analysis/rhythm/bpm_intervals

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_RhythmExtractor2013.html

rhythm.onset_count

curl https://freesound.org/api/sounds/<sound_id>/analysis/rhythm/onset_count

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_OnsetRate.html
_images/rhythm.onset_count.png

rhythm.second_peak_spread

curl https://freesound.org/api/sounds/<sound_id>/analysis/rhythm/second_peak_spread

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_BpmHistogramDescriptors.html

Stats:

/max
/min
/mean

Distribution in Freesound

_images/rhythm.second_peak_spread.mean.png

rhythm.beats_loudness_band_ratio

curl https://freesound.org/api/sounds/<sound_id>/analysis/rhythm/beats_loudness_band_ratio

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_BeatsLoudness.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/rhythm.beats_loudness_band_ratio.mean.000.png _images/rhythm.beats_loudness_band_ratio.mean.001.png _images/rhythm.beats_loudness_band_ratio.mean.002.png _images/rhythm.beats_loudness_band_ratio.mean.003.png _images/rhythm.beats_loudness_band_ratio.mean.004.png _images/rhythm.beats_loudness_band_ratio.mean.005.png

rhythm.second_peak_bpm

curl https://freesound.org/api/sounds/<sound_id>/analysis/rhythm/second_peak_bpm

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_BpmHistogramDescriptors.html

Stats:

/max
/min
/mean

Distribution in Freesound

_images/rhythm.second_peak_bpm.mean.png

rhythm.onset_rate

curl https://freesound.org/api/sounds/<sound_id>/analysis/rhythm/onset_rate

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_OnsetDetection.html

rhythm.beats_position

curl https://freesound.org/api/sounds/<sound_id>/analysis/rhythm/beats_position

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_RhythmExtractor2013.html

rhythm.first_peak_weight

curl https://freesound.org/api/sounds/<sound_id>/analysis/rhythm/first_peak_weight

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_BpmHistogramDescriptors.html

Stats:

/max
/min
/mean

Distribution in Freesound

_images/rhythm.first_peak_weight.mean.png

Tonal Descriptors

tonal.hpcp_entropy

curl https://freesound.org/api/sounds/<sound_id>/analysis/tonal/hpcp_entropy

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_Entropy.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/tonal.hpcp_entropy.mean.png

tonal.chords_scale

curl https://freesound.org/api/sounds/<sound_id>/analysis/tonal/chords_scale

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_ChordsDescriptors.html

tonal.chords_number_rate

curl https://freesound.org/api/sounds/<sound_id>/analysis/tonal/chords_number_rate

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_ChordsDescriptors.html
_images/tonal.chords_number_rate.png

tonal.key_strength

curl https://freesound.org/api/sounds/<sound_id>/analysis/tonal/key_strength

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_Key.html
_images/tonal.key_strength.png

tonal.chords_progression

curl https://freesound.org/api/sounds/<sound_id>/analysis/tonal/chords_progression

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_ChordsDetection.html

tonal.key_scale

curl https://freesound.org/api/sounds/<sound_id>/analysis/tonal/key_scale

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_Key.html

tonal.chords_strength

curl https://freesound.org/api/sounds/<sound_id>/analysis/tonal/chords_strength

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_ChordsDetection.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/tonal.chords_strength.mean.png

tonal.key_key

curl https://freesound.org/api/sounds/<sound_id>/analysis/tonal/key_key

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_Key.html

tonal.chords_changes_rate

curl https://freesound.org/api/sounds/<sound_id>/analysis/tonal/chords_changes_rate

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_ChordsDescriptors.html
_images/tonal.chords_changes_rate.png

tonal.chords_count

curl https://freesound.org/api/sounds/<sound_id>/analysis/tonal/chords_count

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_ChordsDescriptors.html
_images/tonal.chords_count.png

tonal.hpcp_crest

curl https://freesound.org/api/sounds/<sound_id>/analysis/tonal/hpcp_crest

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_Crest.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/tonal.hpcp_crest.mean.png

tonal.chords_histogram

curl https://freesound.org/api/sounds/<sound_id>/analysis/tonal/chords_histogram

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_ChordsDescriptors.html

tonal.chords_key

curl https://freesound.org/api/sounds/<sound_id>/analysis/tonal/chords_key

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_ChordsDescriptors.html

tonal.tuning_frequency

curl https://freesound.org/api/sounds/<sound_id>/analysis/tonal/tuning_frequency

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_TuningFrequency.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/tonal.tuning_frequency.mean.png

tonal.hpcp_peak_count

curl https://freesound.org/api/sounds/<sound_id>/analysis/tonal/hpcp_peak_count

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_PeakDetection.html
_images/tonal.hpcp_peak_count.png

tonal.hpcp

curl https://freesound.org/api/sounds/<sound_id>/analysis/tonal/hpcp

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_HPCP.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/tonal.hpcp.mean.000.png _images/tonal.hpcp.mean.001.png _images/tonal.hpcp.mean.002.png _images/tonal.hpcp.mean.003.png _images/tonal.hpcp.mean.004.png _images/tonal.hpcp.mean.005.png _images/tonal.hpcp.mean.006.png _images/tonal.hpcp.mean.007.png _images/tonal.hpcp.mean.008.png _images/tonal.hpcp.mean.009.png _images/tonal.hpcp.mean.010.png _images/tonal.hpcp.mean.011.png _images/tonal.hpcp.mean.012.png _images/tonal.hpcp.mean.013.png _images/tonal.hpcp.mean.014.png _images/tonal.hpcp.mean.015.png _images/tonal.hpcp.mean.016.png _images/tonal.hpcp.mean.017.png _images/tonal.hpcp.mean.018.png _images/tonal.hpcp.mean.019.png _images/tonal.hpcp.mean.020.png _images/tonal.hpcp.mean.021.png _images/tonal.hpcp.mean.022.png _images/tonal.hpcp.mean.023.png _images/tonal.hpcp.mean.024.png _images/tonal.hpcp.mean.025.png _images/tonal.hpcp.mean.026.png _images/tonal.hpcp.mean.027.png _images/tonal.hpcp.mean.028.png _images/tonal.hpcp.mean.029.png _images/tonal.hpcp.mean.030.png _images/tonal.hpcp.mean.031.png _images/tonal.hpcp.mean.032.png _images/tonal.hpcp.mean.033.png _images/tonal.hpcp.mean.034.png _images/tonal.hpcp.mean.035.png

Sfx Descriptors

sfx.temporal_decrease

curl https://freesound.org/api/sounds/<sound_id>/analysis/sfx/temporal_decrease

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_Decrease.html

Stats:

/max
/min
/mean

Distribution in Freesound

_images/sfx.temporal_decrease.mean.png

sfx.inharmonicity

curl https://freesound.org/api/sounds/<sound_id>/analysis/sfx/inharmonicity

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_ Inharmonicity.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/sfx.inharmonicity.mean.png

sfx.pitch_min_to_total

curl https://freesound.org/api/sounds/<sound_id>/analysis/sfx/pitch_min_to_total

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_MinToTotal.html
_images/sfx.pitch_min_to_total.png

sfx.tc_to_total

curl https://freesound.org/api/sounds/<sound_id>/analysis/sfx/tc_to_total

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_TCToTotal.html
_images/sfx.tc_to_total.png

sfx.der_av_after_max

curl https://freesound.org/api/sounds/<sound_id>/analysis/sfx/der_av_after_max

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_DerivativeSFX.html

Stats:

/max
/min
/mean

Distribution in Freesound

_images/sfx.der_av_after_max.mean.png

sfx.pitch_max_to_total

curl https://freesound.org/api/sounds/<sound_id>/analysis/sfx/pitch_max_to_total

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_MaxToTotal.html
_images/sfx.pitch_max_to_total.png

sfx.temporal_spread

curl https://freesound.org/api/sounds/<sound_id>/analysis/sfx/temporal_spread

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_CentralMoments.html

Stats:

/max
/min
/mean

Distribution in Freesound

_images/sfx.temporal_spread.mean.png

sfx.temporal_kurtosis

curl https://freesound.org/api/sounds/<sound_id>/analysis/sfx/temporal_kurtosis

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_CentralMoments.html

Stats:

/max
/min
/mean

Distribution in Freesound

_images/sfx.temporal_kurtosis.mean.png

sfx.logattacktime

curl https://freesound.org/api/sounds/<sound_id>/analysis/sfx/logattacktime

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_LogAttackTime.html

Stats:

/max
/min
/mean

Distribution in Freesound

_images/sfx.logattacktime.mean.png

sfx.temporal_centroid

curl https://freesound.org/api/sounds/<sound_id>/analysis/sfx/temporal_centroid

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_Centroid.html

Stats:

/max
/min
/mean

Distribution in Freesound

_images/sfx.temporal_centroid.mean.png

sfx.tristimulus

curl https://freesound.org/api/sounds/<sound_id>/analysis/sfx/tristimulus

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_ Tristimulus.html

Stats:

/min
/max
/dvar2
/dmean2
/dmean
/var
/dvar
/mean

Distribution in Freesound

_images/sfx.tristimulus.mean.000.png _images/sfx.tristimulus.mean.001.png _images/sfx.tristimulus.mean.002.png

sfx.max_der_before_max

curl https://freesound.org/api/sounds/<sound_id>/analysis/sfx/max_der_before_max

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_DerivativeSFX.html

Stats:

/max
/min
/mean

Distribution in Freesound

_images/sfx.max_der_before_max.mean.png

sfx.strongdecay

curl https://freesound.org/api/sounds/<sound_id>/analysis/sfx/strongdecay

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_StrongDecay.html
_images/sfx.strongdecay.png

sfx.pitch_centroid

curl https://freesound.org/api/sounds/<sound_id>/analysis/sfx/pitch_centroid

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_Centroid.html

Stats:

/max
/min
/mean

Distribution in Freesound

_images/sfx.pitch_centroid.mean.png

sfx.duration

curl https://freesound.org/api/sounds/<sound_id>/analysis/sfx/duration

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_ Duration.html
_images/sfx.duration.png

sfx.temporal_skewness

curl https://freesound.org/api/sounds/<sound_id>/analysis/sfx/temporal_skewness

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_CentralMoments.html

Stats:

/max
/min
/mean

Distribution in Freesound

_images/sfx.temporal_skewness.mean.png

sfx.effective_duration

curl https://freesound.org/api/sounds/<sound_id>/analysis/sfx/effective_duration

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_EffectiveDuration.html

Stats:

/max
/min
/mean

Distribution in Freesound

_images/sfx.effective_duration.mean.png

sfx.max_to_total

curl https://freesound.org/api/sounds/<sound_id>/analysis/sfx/max_to_total

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_MaxToTotal.html
_images/sfx.max_to_total.png

sfx.oddtoevenharmonicenergyratio

curl https://freesound.org/api/sounds/<sound_id>/analysis/sfx/oddtoevenharmonicenergyratio

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_ OddToEvenHarmonicEnergyRatio.html

Stats:

/dmean2
/dmean
/mean
/max
/min

Distribution in Freesound

_images/sfx.oddtoevenharmonicenergyratio.mean.png

sfx.pitch_after_max_to_before_max_energy_ratio

curl https://freesound.org/api/sounds/<sound_id>/analysis/sfx/pitch_after_max_to_before_max_energy_ratio

Essentia Algorithm

http://essentia.upf.edu/documentation/reference/streaming_AfterMaxToBeforeMaxEnergyRatio.html
_images/sfx.pitch_after_max_to_before_max_energy_ratio.png