This component/script is accessed from the Unity Component menu, then Avatar Effects then select "Color Filter - LUT".
You can add colour treatments to your gesture using the Avatar Effect LUT script.
When you import a texture to apply as a LUT you should apply the following settings to your .png file;
Texture Type: Advanced
Import Type: Default
Bypass sRGB Sampling: ticked
Generate Mip Maps: Off
Wrap Mode: Clamp
Filter Mode: Bilinear
Aniso Level: 0
For more information on creating LUTs, see Unity's documentation here; 
This component/script is accessed from the Unity Component menu, then Avatar Effects then select "Play Audio".
You can add audio effects, synchronised with other events in the gesture, using the Audio Effect component;
For more information on audio files and Unity see here;