Mixed In Key (also known as MIK) is Windows and Macintosh software that simplifies a DJ technique called harmonic mixing. Mixed In Key analyses MP3 and WAV files and determines the musical key of every file. Knowing the key, DJs can use music theory (such as the Circle of Fifths) to play songs in a harmonically-pleasing order.

The software helps to solve Mixed In Key’s software was developed to provide a Windows interface for the toner key detection algorithm created by zplane.development. The original tONaRT algorithm created by zplane.development had a simple Windows-based demo which could not process multiple audio files at once. Yakov Vorobyev created a simple C# .NET Windows application that could batch-process multiple files. he first version was released on March 25, 2006. Soon after, work on Mac OS X began, and on June 4, 2006, the first version of Mac OS X was released.

website: mixedinkey.com/