{( Science of Audio )}


AFIT or Audio Frequency Identification Training is a game to help audio engineers and musicians learn to identify frequencies by ear.

This skill is crucial for

  • eliminating feedback from PA systems,
  • eq-ing instruments,
  • mixing & mastering audio, and
  • perfect pitch.

The Game

There are six levels with a minimum of ten rounds each. The game plays a tone; you click on the correct frequency. If you get every answer correct on the first try, you will finish each level in 10 rounds. If you get it on the second try, you receive half the points, and it will take more rounds to complete the level. At the end, your overall ranking is based on the percentage of possible points earned.


  • 96% - 100% = Mastering Engineer
  • 85% - 95% = A1 - FOH Engineer
  • 75% - 85% = A2 - Monitors Engineer
  • 65% - 75% = A3 - Systems Engineer
  • 50% - 65% = A4 - Trainee Engineer

Bonus Rounds

After each level, there is a bonus round where you type in a guess for the frequency. Pro tip! On bonus rounds, all frequencies are multiples of 100.

These bonus rounds are the ultimate goal of the game - to identify frequencies by ear. In live sound situations, you must do this while other loud sounds are playing and strangers are watching you work.

The Strategy

We begin with multiple choice and work toward the broader goal. In the first level, each of the answers is separated by one octave, making it easier to tell them apart. As you progress, the frequencies get closer and closer together. On the final levels, there are six choices instead of two, and the answers are 1/3 to 1/4 octave apart.

To work effectively in pro audio, you do not need to be able to tell the exact frequency, you only need to get close. How close? Generally, within 1/3 octave. So if you are guessing at a frequency between 1000 and 2000 Hz, that means within 333 Hz of correct. This allows you to use EQ to kill feedback in a PA system, or to isolate a problem frequency in an important instrument.

The Status

This game is currently in beta. If you find bugs, or have ideas for features that would help you learn, please send any comments or feedback to riverdriverecords at gmail dot com


The game was created by Lars Rehnberg, because he wanted to play it. It uses jQuery, WAD (Web Audio DAW), Bootstrap, Laravel, and HTML 5.