| Option Category | # # NTSC POST-PROCESSING OPTIONS # |
| Description | This option sets the A value for NTSC signal processing. |
| Full Command | -yiq_a <float> |
| Alt. Command | none |
| Reverse Command | none |
| Example | mame64 pacman -hlsl_enable -yiq_enable -yiq_a 0.1 |
| mame.ini Command | yiq_a |
| Command Default | 0.5 |
| Argument Format | <float> |