MP3 Ringtone Maker is a tool that lets you make ringtones out of MP3 audio. In other words, you can use the MP3 files on your phone as your ringtone or voice notification. If you like a particular song or TV show theme track, you can set it as your ringtone using this tool. It lets you cut and merge music files the way you want. You may even record your or someone else’s voice and set it as ringtone. To use the tool, you should already have an audio file set up in your SD card or phone’s internal memory.