The interface is designed for simplicity, modeling the original hardware's behavior where the compression is frequency-dependent and non-linear.
This is a pro studio staple. Use an 1176 (fast FET compressor) first to catch sharp peaks (4:1 ratio, fast attack/release). Follow it with the CLA-2A (slow optical) for smooth leveling. The result: loud, present, and buttery smooth vocals. cla-2a compressor limiter