We don't officially support recording two audio sources at once (eg microphone + unity audio). You might be able to get it to work in a hacky way if your sound card supports it. Here is the method from our FAQ: How do I record in-game audio and microphone audio at the same time? Currently this plugin only supports recording audio from a single Windows audio device. There is a “trick” you can use though. In Windows 7 (and perhaps Vista) you may be able to set your microphone to play through the speakers by going to: Control Panel -> Sound -> Recording -> Select your microphone -> right click -> Properties -> Listen -> check "Listen to this device". You should then hear your microphone recording through your speakers. It’s recommended to use headphones during recording to prevent feedback from the speakers into the microphone. You then need to enable the "Stereo Mix" recording device (it may be hidden by default), and this is the microphone that you will record from in Unity. This virtual microphone will now contain the game audio and also the microphone audio that was set to Listen. This option is also driver specific, as not all sound drivers have a Stereo Mix recording device.