SAFE-DB

A Dataset of Music Production Metadata​

The Semantic Audio Feature Extraction Dataset (SAFE-DB) is a continually updating database of semantically annotated music production metadata, taken from an international user group of sound engineers. The data is taken from 4 audio effects: a dynamic range compressor, an overdrive distortion, a parametric equaliser and an algorithmic reverb. Each entry into the dataset contains the following items:

Descriptor​

A string representing a user’s description of the audio transformation (e.g. warm, bright, fluffly).

Audio Features​

An array of audio features extracted from the audio file, taken before and after processing is applied to the signal. Feature list:

• Mean
• Variance
• StdDev
• RMS_Amplitude
• Zero_Crossing_Rate
• Spectral_Centroid
• Spectral_Variance
• Spectral_Standard_Deviation
• Spectral_Skewness
• Spectral_Kurtosis
• Irregularity_J
• Irregularity_K
• F0 (autocorrelation)
• Smoothness
• Spectral_Roll_Off
• Spectral_Flatness
• Spectral_Crest
• Spectral_Slope
• Peak_Spectral_Centroid
• Peak_Spectral_Variance
• Peak_Spectral_Standard_Deviation
• Peak_Spectral_Skewness
• Peak_Spectral_Kurtosis
• Peak_Irregularity_J
• Peak_Irregularity_K
• Peak_Tristimulus (x3)
• Inharmonicity
• Harmonic_Spectral_Centroid
• Harmonic_Spectral_Variance
• Harmonic_Spectral_Standard_Deviation
• Harmonic_Spectral_Skewness
• Harmonic_Spectral_Kurtosis
• Harmonic_Irregularity_J
• Harmonic_Irregularity_K
• Harmonic_Tristimulus (x3)
• Noisiness
• Bark_Coefficients (x25)
• Parity_Ratio
• MFCCs (x13)

Audio Effect Parameters​

A variable sized array of plug-in parameters used to apply processing to the signal.

User Data​

A series of strings representing the user’s age, location, language and experience, along with the genre of the music and the instrument being processed. These fields can be left blank.

Note: To limit the file-size of the download, feature-sets are averaged. For data from a specific date, or for multi-channel time series features please get in touch.

Download​

• Dynamic Range Compressor – User Data | Feature Data
• Overdrive Distortion - User Data | Feature Data
• Parametric Equaliser – User Data | Feature Data
• Algorithmic Reverb - User Data | Feature Data
• Download All (.zip)

References​

R. Stables, S. Enderby, B. De Man, G. Fazekas, and J. D. Reiss, “SAFE: A system for the extraction and retrieval of semantic audio descriptors”, The International Society for Music Information Retrieval (ISMIR), 2014.

Data Visualisation​

Using multidimensional scaling, we can map the descriptive terms from the dataset into a more intuitive space. The interactive visualisation below shows the feature space of the SAFE-DB in 3-dimensions.

Live demo coming soon