[LAD] Plugin 1/oct frequency controls (AMS/MCP/VCO)

[Jeff McClintock]

> I think the most reasonable standard for an absolute 1/oct
> frequency unit is 0.0 = 440Hz

My modular plugins use a reference of 440Hz. Also parameters are ranged
between 0.0 - 10.0 but can exceed that if need be. (in a modular synth,
everything needs to interoperate).

So for frequency 5.0 is 440Hz (Middle-A). i.e. the middle of the range -
5.0, is the standard 'middle' key.

Great idea though. Octaves are far more universal than western semitones,
yet trivial to convert between. 440Hz is a good choice.

Best Regards,
Jeff