# Input Mix Option

| Message                              | Description                                               | Arguments |
| ------------------------------------ | --------------------------------------------------------- | --------- |
| `/mixeffect/legacy-audio/mix-option` | Sets the mix option for the selected legacy audio source. | Multiple  |

| Argument        | Type    | Description                                                                                                                                                                           |
| --------------- | ------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Audio Source ID | Integer | Integer that is the audio source ID.                                                                                                                                                  |
| Mix Option      | Integer | <p><strong>MixEffect Version 1.4.4:</strong></p><p>0 = Toggle<br>1 = On</p><p>2 = Off<br>3 = AFV<br><br><strong>MixEffect Version 1.4.3:</strong><br>0 = Off<br>1 = On<br>2 = AFV</p> |

> **Note**: Prior to MixEffect 1.4.4, the values for MixOption were 0 = Off, 1 = On, 2 = AFV. In MIxEffect 1.4.4, these values were changed to be more consistent with the Fairlight Audio Input Mix Option OSC command.

A list of valid, but not exhaustive, Audio Source IDs on a per-switcher basis is included below.

```
case input1 = 1
case input2 = 2
case input3 = 3
case input4 = 4
case input5 = 5
case input6 = 6
case input7 = 7
case input8 = 8
case input9 = 9
case input10 = 10
case input11 = 11
case input12 = 12
case input13 = 13
case input14 = 14
case input15 = 15
case input16 = 16
case input17 = 17
case input18 = 18
case input19 = 19
case input20 = 20
case xlr = 1001
case aesbu = 1101
case rca = 1201
case mic1 = 1301
case mic2 = 1302
case mp1 = 2001
case mp2 = 2002
case mp3 = 2003
case mp4 = 2004
case trs = 1400-1499 (this is a range of TRS inputs)
case madi = 1500-1599 (this is a range of MADI inputs)
```