Music Speed Changer Lite 2 is a free multimedia app developed by M-Apps for Android devices. It is a versatile audio and video playback app that allows users to change the playback speed and the pitch of audio in real-time and independently from each other. The app supports various formats including mp3, wav, m4a, ogg, aac, and mp4 video. It also supports subtitles, images, and text.

The Lite version of the app offers features such as time and frequency domain algorithms, range and position markers, volume amplification, channel selection, and audio recording. On the other hand, the Pro version offers additional features such as loop and select regions, export/share and import songs with annotations, playlists, video view with zoom support, text view with auto-scrolling, subtitles view, image view with zoom support, export modified audio to various formats, batch conversion of files, and frequency conversion.

This app is useful for music instrument training by adjusting tempo and pitch to anytune, transcription, karaoke, and more. The app also comes with a help section to assist users in navigating through the app.