Placing this component into your project will auto-install a Mute button and Volume slider to the TouchDesigner UI toolbar. With these you can control the volume of all Audio Device Out CHOPs in your project without having to look for them.
I suggest placing this into your default startup project file.
I have a tutorial on how it was made and how to expand the TD UI with your own tools: https://youtu.be/zzWvnlYdeQM