Voices shift better than music. Getting good reverb is more of an artform even for the most automated signal processors. The output consists of an initial signal followed by many reflections. As the reflections move out in time, a lowpass filter is usually applied with decreasing cutoff frequency. If more than one track is attached to a single reverb plugin, the reflections for both tracks are swapped to simulate stereo.
Simulated stereo is capable of using a separate CPU for each track.
RGB 601 When recording video from certain devices you'll get black at either 0 or 16 and white at either 255 or 235. The purpose here is to give professional TV gurus headroom and footroom for their whites and blacks. Alternatively you may be doing compositing and want the extra headroom for an intermediate step. Either way you'll want only RGB video on a computer monitor and only 601 video when you print to video. To convert between the two, Broadcast 2000 supplies the RGB 601 plugin.