Audio INPUT Stages:
A/D    = Stage0   Front End to Digital
Mixer  = Stage1   Mixer (after the A/D converter)
MIC    = Stage2   input dBm after MIXER and MIC sliders
DEXP   = Stage3   Downward Expander / Gate
EQ     = Stage4   input dBm after EQ sliders
Lev    = Stage5   input dBm afer leveler gain
LevG   = Stage5   Leveler Gain display only
CPDR   = Stage6   Compander
DX     = Stage6   DX Compressor
Mod    = Stage7   Modulation Mode
FLTR   = Stage 8  TX Filter
ALC    = Stage9   input dBm after DX, Cmpd, Mode, TX Filter
ALCG   = Stage9   ALC attack dBm, foldback amount
I/Q    = Stage10  I/Q correction
Scale  = Stage11  Audio Scaling
D/A    = Stage12  back to Analog (to the PA)