Setting up a USB microphone with PlayIt Live for live broadcasting can be done in several ways depending on your setup preferences.

For direct USB microphone connection, you can use the Microphone Mix plugin (available at https://www.playitsoftware.com/Plugins/View/MicrophoneMix). This plugin allows you to connect a USB microphone directly to your computer and mix it with PlayIt Live's output for streaming with the Internet Broadcast feature. The plugin includes ducking functionality, which lowers the music volume when you click a button, perfect for talking over tracks during live shows.

For mixer-based setups, connect your USB or XLR microphone to an external mixer, route PlayIt Live's output to the mixer, and control both audio sources using the mixer's faders. If you have a USB mixer, connect it directly to your computer and select the audio device under File > Settings > Live-Assist Mode tab. For analogue mixers, you'll need a USB audio interface (such as the Behringer U-CONTROL UCA202) to connect the mixer output back to your computer.