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| WaveWarp 2.0 Example DrawingBoard
VisualisationOfAudioEffectsExample1
Description
Visualisation of Audio Effects Example 1
Illustrates the use of the Audio Phase-Space Scope for plotting the real-time trajectory of one audio signal versus another
(the name "Phase-Space" is rooted in dynamic system theory where it is often instructive to plot one "phase" of a system
-e.g. the position of an object -- versus another "phase" of the system -- e.g. the speed that an object is moving ! --
however the name is used here in a more general context for plotting anything against anything !)
In this example, a signal is passed through an effect (Spectral Shift 1 in this case), and plotted against a delayed version of
the original signal. This configuration is useful for demonstrating the main features of the plotter. To start with, the default
settings are such that the Delay length is set equal to the Latency of the Spectral Shifter (1000 samples). Also, the Spectral
Shifter is disabled (via its "Bypass" checkbox). With these settings, the two signals entering the plotter are
identical. Therefore, when plotted against one another, a straight line with a slope of 45 degrees is observed. Try playing
the Drawing Board (with its default settings) and you will see this straight line in the scope window. Now
try adjusting the Delay one sample away from 1000. Now the two signals are out of synch (though they are otherwise
identical). The plot will become a narrow ellipse. By adjusting the Delay successively further away from the value of 1000,
the plot will become a successively "fatter" elllipse until it is no longer recognisable as such !
Now reset the Delay to 1000 and check that the 45 degree line is re-established in the plotter. De-select the "Bypass" in
the Spectral Shifter to activate the efffect. The plotter will immediately respond with an interesting geometric form,
representing the relationship between the pitch-shifted signal and the raw signal. Try changing the settings of the Spectral
Shifter and observe the changes in the display. Generally speaking , the further away the plot is from the straight 45 degree
line, the more "effect" there is. (This is even easier to see with simple sources such as a pure sine wave. Try it !)
Experiment with different effects other than the Spectral Shifter. You will find the visualisations interesting (and sometimes
inspiring !).
Components used:
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