A basic 1/3 octave Real Time Analyzer. Includes a mono sum switch.

Version 0.2 changes:

- ported to OS X
- sharpened Q of bands for better readouts
- added Metering Interval control
- updated graphics

Tech Note: there is a known issue with the RTA plug-in where you may see false readings in the highest band, if running a session at 44.1K or 48K. This is an artifact of trying to measure frequencies near half the sample rate (without resorting to a more expensive upsampling approach).