Here's what iZotope/Exponential Audio say:
Craft the perfect spatial effects for your music productions with R4. Use detailed, creative controls to add personality and space to your music—without ever compromising clarity.
- Lush stereo reverb algorithm
- Chorus and Gate modules for musical effects
- Dynamic tail suppression to lower reverb in louder parts of a mix
- Over 1,200 presets
- Create ambient drones and texture with Freeze