# Chroma Advanced Parameter Set

| Message                                        | Description                                                                                                                                                                                       | Arguments |
| ---------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------- |
| `/mixeffect/usk/chroma-advanced/parameter/set` | Sets a single the Chroma Advanced upstream keyer parameter. This is available on certain ATEM switchers such as the ATEM Mini line, ATEM Television Studio Pro 4K, and the ATEM Constellation 8K. | Multiple  |

| Argument  | Type    | Description                                                                                                                                                                                                    |
| --------- | ------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Parameter | Integer | <p>0 = Foreground Level<br>1 = Background Level<br>2 = Key Edge<br>3 = Spill Suppression<br>4 = Flare Suppression<br>5 = Brightness<br>6 = Contrast<br>7 = Saturation<br>8 = Red<br>9 = Green<br>10 = Blue</p> |
| New Value | Float   | The new value.                                                                                                                                                                                                 |
| USK       | Integer | One-based index of the Upstream Keyer. Default is 1.                                                                                                                                                           |
| M/E       | Integer | One-based index of the Mix Effect Bus. Default is 1.                                                                                                                                                           |