TimeBandsConsumer¶

class spectacoular.consumer.TimeBandsConsumer¶

Bases: TimeConsumer

TimeConsumer derived class for building an interface from Acoular’s generator pipelines to Bokeh’s ColumnDataSource which specialises in Plots over frequency bands (like octave spectrum)

Works like TimeConsumer, but ignores down and rollover. Instead, just the first sample of each block is taken from the input. ds has a column for each input channel with one frequency band value in each row. bands gives the bands and lfunc can be used to convert to human-readable label strings.

lfunc = Callable( lambda bands: ["{:.0f}".format(f) for f in bands])¶

Function to convert bands into list of labels

bands = Property( depends_on = ['source.digest'])¶

List of labels for bands

numbands = Property( depends_on = ['source.digest'])¶

Number of bands

update()¶

callback function for GUI event loop, updates data source