Most of the aspect ratio settings can be controlled from the menu. The settings shown below are those that cannot be accessed in this way
| Setting | Default | Description |
|---|---|---|
| Custom Screen Aspect | 1335 | The aspect value used when custom is selected for display screen ratio. |
| Auto Detect Aspect Sensitivity | 40 | Luma values below this are considered balck by the auto aspect ratio code. |
| Ignore Non-Black Pixels | 3 | Used by auto aspect ratio code, if there are more non black pixels than this then the line is not considered black/ |
| Zoom In Frame Count | 60 | Number of times we need to detect a letterboxed picture before changing mode |
| Zoom Out Frame Count | 3 | Number of consecutive frame before autodetction code will switch to a lower ratio. |
| Aspect History Time | 300 | Number of seconds the successive ratios are saved and can be restored quickly if detected. |
| Aspect Consistency Time | 15 | ??? |
| Skip Percentage | 17 | Amount of left and right edges of the screen that should not be used by the black bar detection code. |
| Chroma Range | 16 | Used by balck bar detection. This is the range of deviation from back allowed in chroma information. |
| Allow greater ratio than screen ratio | ON | Can be used (when OFF) to disable ratio greater than screen ratio. |
| Use WSS data | OFF | When ON, the automatic aspect ratio detection takes into account the WSS data including in the VBI data. |
| Use only WSS data | OFF | When ON, the automatic aspect ratio detection uses only the WSS data including in the VBI data to do its choices for ratio. This setting is relevant only when "Use WSS data" is ON. |
| Bounce Period (Secs) | 1800 | Number of seconds between bounce movements |
| Bounce Timer Period (ms) | 1000 | Frequency that bounce time is checked. |
| Bounce Amplitude (%) | 100 | Percenage of full range that bounce operates on |
| Orbit Timer Period (ms) | 60000 | Period between orbit movements |
| Orbit Size | 8 | Number of pixels range that orbit operates on. Overscan must be at least this value. |