Five separate sound files, two single shot and three double

5 variations of the same short, hum or drone style noise, suitable for either alerts or accompany error messages, wrong actions, disabled buttons, etc.

One of this files is a loop-ready sound. That means you are allowed to play it indefinitely without notice any seam.

However, if you don’t loop it, in some cases you might hear a click at the end. To avoid this issue you may use the other one that is a one shot version, with smooth start and end.

The loop-ready version of this sound file is also included in the Game Pack 01