There are three levels of voice processing for the FT-991A. First is where there is no equalization and the voice levels are flat across the bandwidth. Next is Equalization where you can apply DSP adjustments across 3 (Low, Medium, and High Voice Frequency) across your bandwidth. And finally, Processed, where compression is applied to DSP settings.

Many of us have heard poorly adjusted audio on the band. This video will show you have to properly adjust your levels.