MicControl 3

MicControl 3 is available from Unity version 5.3.5 and up. However only the latest unity version will feature pre-build example scenes.
Mac users be aware that osX and other systems do not support the use of multiple microphones!
Windows and Linux users do not suffer this OS limitation.
Have you ever wanted to use your microphone as a game mechanic or feature? Now you can!
Literally blow your game away with this simple but very powerful asset!
Mic Control 3 is a script build on-top of Unity's Microphone class.
It takes away the pain of setting up the microphone class yourself, allows you to call information from a microphone device and use that data through the "loudness", "spectrumData" or "spectrumCurve" variables.
( loudness = data converted from audio to a single float. Note not an actual audio stream).
(spectrumData = an array filled with the complete frequency data, representing accurately the incoming audio stream).
(spectrumCurve = Based on the spectrumData array, this curve allows users to evaluate its values based on a given time.
The user can set the device, sensitivity, etc...
Select the device and start creating games with a microphone!
More details about MicControl 3 can be found on the website below.

Try before you buy (non-commercial license)

Website
Tech demo
Forum