Automatic Key Detection

Key Detection is new function found in Audio Surgeon. Ten years ago when we first started developing audio software key detection was being worked on but wasn’t very good. At that time the best available product could detect key accurately about 35% of the time. Since that time the technology has improved and the accuracy increased substantially. In fact, the accuracy statistics have been reversed. Today the accuracy is in the 70-80% range.

Audio Surgeon not only will analyze and determing the key of a group or batch of songs, it can also change the key of these songs.

The table below shows a comparison of products that contain key detection algorithms. This data was generated from a database of 1000 songs, across all types of music genres.

When a file or group of files is opened in Audio Surgeon, it can determine the key by running the File Analysis feature found in Tab 1. Audio Surgeon lists all keys as flats. Why? Because every flat also has a corresponding sharp, and it simpler to just use one or the other (flats or sharps), rather than both and then trying to determine which is the more common of the two expressions.

Also, it is not uncommon for songs to modulate or change key within a song. In such situations, Audio Surgeon analyzes the song and makes a global estimate. It assigns a key that is most compatible with the entire length of the songs. It does not and cannot determine and assign more than one key for each song.

The table above shows that Audio Surgeon’s key determination ability is good, but it is not perfect. If you think that the key assigned to a song or file that you open is incorrect, Audio Surgeon does give you the ability to over-ride the calculated key and substitute a different one.

Key Determination, along with Automatic Beat Detection and Loudness determiniation are three of the unique features of songs that can be determined by Audio Surgeon. There is a good overview video of Audion found on our home page if you’d like to learn more. If you are interested in buying, or if you’d like to take our fully functional free demo for a test drive, please click the appropriate blue button near the top, right side of this page.