AudioLink lets you change how your avatar looks using the audio played in specific VRChat worlds.
This tutorial explains how to add AudioLink to your avatar using the popular Poiyomi Shader.
Tested with Poiyomi Shader v8 however the steps are identical for v7. Tested with Unity 2019.4.31f1, VRCSDK3-AVATAR-2022.04.21.03.29_Public and the Canis Woof by Rezillo Ryker.