| PackageDescription | example Vamp plugins, host and RDF generator
Vamp is an audio processing plugin system for plugins that extract
descriptive information from audio data - typically referred to as
audio analysis plugins or audio feature extraction plugins.
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This package contains the following example plugins:
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* Zero Crossings calculates the positions and density of
zero-crossing points in an audio waveform.
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* Spectral Centroid calculates the centre of gravity of the
frequency domain representation of each block of audio.
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* Simple Power Spectrum calculates a power spectrum from the input
audio. Actually, it doesn't do any work except calculating power
from a cartesian complex FFT output. The work of calculating this
frequency domain output is done for it by the host or host SDK; the
plugin just needs to declare that it wants frequency domain
input. This is the simplest of the example plugins.
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* Amplitude Follower is an implementation of SuperCollider's
amplitude-follower algorithm as a simple Vamp plugin.
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* Simple Percussion Onset Detector: estimates the locations of
percussive onsets using a simple method described in "Drum Source
Separation using Percussive Feature Detection and Spectral
Modulation" by Dan Barry, Derry Fitzgerald, Eugene Coyle and Bob
Lawlor, ISSC 2005.
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* Simple Fixed Tempo Estimator: calculates a single beats-per-minute
value which is an estimate of the tempo of a piece of music that is
assumed to be of fixed tempo, using autocorrelation of a frequency
domain energy rise metric. It has several outputs that return
intermediate results used in the calculation, and may be a useful
example of a plugin having several outputs with varying feature
structures.
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Also included is a simple host that can enumerate plugins, list their
features, and process an audio file as well as a utility to generate
Vamp plugin RDF templates. |