Output Sample Type and Sample Rate¶

A Vamp plugin takes audio as input, as a series of process blocks with associated timestamps, and returns a series of "feature structures". (See diagram.)

Each returned feature might have a timestamp... or it might not. Whether a timestamp is provided -- and, if it is provided, what it means -- are determined by the SampleType and SampleRate properties of the plugin output that returns the feature.

Sample Type¶

A plugin output's SampleType property may be either OneSamplePerStep, FixedSampleRate, or VariableSampleRate.