A flexible anti-aliased (bandlimited) digital audio oscillator.
This library generates waveforms of a variety of shapes made of line segments.
It does not do envelopes, LFO effects, etc.; it merely tries to solve the
problem of generating an artifact-free morphable digital waveform with a
variety of spectra, and leaves it to the user to rescale the waveform and mix
multiple voices, etc.
