RVB-61 is a multi-band reverb plugin. It splits your signal into three frequency bands (Low, Mid, and High) using adjustable crossover points, and each band has its own reverb type and parameters. So you can have a short, tight reverb on the low end, a long hall on the mids, and a bright plate on the highs, or any combination you like. That lets you fix frequency-specific reverb problems (e.g. muddy lows or harsh highs) and design spaces that would be difficult with a single reverb.
 
Crossovers. Low/High and Mid/High crossover controls set where the bands split (e.g. Low/High around 200 to 2000 Hz, Mid/High around 2000 to 8000 Hz). The crossover network is designed for minimal phase distortion and a flat response when the bands are recombined. A global Bypass turns all reverb off for A/B.
 
Per-band parameters. For each band you choose a Reverb Type: Room (natural room ambience), Hall (long, spacious decay), Plate (bright, controlled tail), Shimmer (bright, expansive with upper harmonics), and Cave (very wide, diffuse space). Room Size (or equivalent) sets the perceived size of the space for that band. Damping controls how much high-frequency absorption is in the tail (low for bright, high for warm). Wetness sets the dry/wet balance for that band. Width sets the stereo spread of the reverb for that band. So each band can have a different character, size, and wetness.
 
Ideal for mix engineers and producers who want reverb that can be tuned separately for low, mid, and high frequencies.