# Luma Key Gain Set

| Message                            | Description                                        | Arguments |
| ---------------------------------- | -------------------------------------------------- | --------- |
| `/mixeffect/usk/luma/key/gain/set` | Sets the Gain setting for the Luma upstream keyer. | Multiple  |

| Argument  | Type    | Description                                          |
| --------- | ------- | ---------------------------------------------------- |
| 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. |