A free program for Android, by AndroTechMania.

With the Audio Edito app, you can create your own sounds from music and make personalized ringtones. This is the most sophisticated and experienced music editor available in the market. It includes all the tools required to edit and mix music, such as the Cutter for trimming and ringtone creation, the Mixer for blending songs, and the Merger for joining songs. Additionally, the Video to MP3 Audio Extractor, Tag Editor, and Audio Converter can all change metadata like album art, album name, and other information. Look no further if you want to edit audio as the Audio Editor app has almost everything you need.