The Exciter generates the extra harmonics from the pure sine wave input.
This is a helpful effects for enhancing the audio character from
the single waveform output.

The picture (Fig.7) shows a transformed sine input in Exciter mode.
Unfortunately, the parameters cannot change in real time because
it takes over 2 second for generating the wavetable.
The parameters are stored into microSD card when the edit work has
been completed.