As the Paid version of Mp3Mixer which is to help you cut, join, merge MP3/Audio files, this app provides you some advanced features:
1. NO AD
2. export various format music, including MP3/M4A/WAV/WMA/OGG/AMR/AWB/OPUS/AAC/FLAC/MKA
3. customised bitrate and sample rate
4. unlimited projects and clips

It has all features of Mp3Mixer:
1. lets you import various format music on your phone
2. allows you to choose any portion in music files easily by simple tap and drag. Most popular music/sound files are supported, including, MP3/M4A/WAV/WMA/OGG/AMR/AWB/OPUS/AAC/FLAC/MKA
3. cut, join MP3 audio files by simple tap and drag
4. lets you add simple effects & transitions
5. even allows you to merge multiple MP3/Audio files as single one with effects
6. allows you to export various format music with different qualities
7. allows you to share the exported music with other apps in your phone
8. load/save music project you are working on to get your job done easily

This app is still in development, and any suggestions are welcome.