Material Deck is a premium module that allows you to control Foundry using an Elgato Stream Deck, which is a device that has physical buttons with displays behind them. Material Deck uses this to, for example, control playlists, execute macros and display and control the combat tracker.
The module allows a high degree of customization, where each button on the Stream Deck can be assigned any desired function. Furthermore, it supports folder stuctures, allowing easy switching between various button configurations so you can easily switch between the combat tracker, soundboard, or any other (custom) configuration.
Feel free to join the Material Foundry Discord server, where you can discuss this and other hardware based modules, and get support if you run into issues.
Material Deck requires a Material Foundry Patreon subscription of the 'Material Apprentice' tier or higher, more info here.
Documentation