MP3 Key Changer
As the name of this program implies, MP3 Key Changer allows you to transpose an audio track from one key to another. It can be easily handled by users of any experience level. This type of tool can be of assistance if you want to sing along with your favorite music pieces.
The interface of the application is clean and pretty intuitive. Audio tracks can be accessed by using either the file browser or 'drag and drop' method. Unfortunately, you cannot work with multiple items at the same time.
So, you can preview the track in a built-in audio player, pause and stop it, as well as navigate back and forth by using a slider. Besides transposing the track to a lower or upper key, you can also increase or decrease its tempo level.
In addition, you can set the algorithm type and quality level for the tempo and transposer, as well as select the audio output device. Once the modifications are made, you can save the new file by establishing its location, name and format (WAV or MP3).
The simple-to-use program runs on a moderate amount of CPU and system memory, is pretty responsive to commands and contains user documentation. We have not come across any problems throughout our evaluation; MP3 Key Changer did not freeze, crash or pop up error dialogs. Thanks to its intuitive layout and overall simplicity, first-time users can seamlessly figure out this app's features. No recent updates have been made.