What is .MT9 file extension?
Audio file created in the Music 2.0 format, which was developed by Korea's Electronics and Telecommunications Research Institute (ETRI); separates instruments into six channels so that listeners can adjust the volume of individual parts; meant to store interactive music.
Music 2.0 digital audio files can be used for changing levels of guitar, drums, vocals, and other instruments. The MT9 format is still under development and has not been widely adopted. Some commercial firms have investigated its potential in mobile phones and other playback devices.
You can see a list of software programs here on easyfileopener.org that can open this file type so that you don’t need to search for it on the web. You can then open your file with this extension using a software listed below.