Upload M4R file from your device memory or cloud or via URL
Once uploading is complete, press the convert button
Wait until the end of the conversion and download new MIDI file
M4A is an audio file compressed using MPEG-4 technology, which has a lossy compression algorithm. The M4R file contains the ringtone in the M4A MPEG-4 file format, which uses the default audio format to store the song in the iPhone. The M4R format, like M4A, is designed to download audio to Apple devices through iTunes. Such a file can be created by converting other formats or uploading it from the official iTunes store. You don't have to look for converters or special programs, you can make m4r from m4a using standard tools of any operating system by changing the last letter of the extension manually. But for this to work like an iPhone ringtone, remember that it can only be created from songs purchased from the iTunes music store.
MIDI was created in 1982 by leading manufacturers of electronic musical instruments - Yamaha, Roland, Korg, E-mu, and others. Manufacturers wanted an easy way to make their products compatible with devices from other brands. Unlike regular audio files such as MP3 or WAV, MIDI files do not contain actual audio data and are therefore much smaller. The MIDI interface transmits information about the actions performed on the musical device - for example, pressing a key. This contains information about two parameters: the number of the pressed key and the force of impact on it. Before the advent of standard MIDI files, an arrangement prepared in one sequencer could not be loaded into another due to format incompatibilities. Another plus of MIDI is that polyphony was originally laid in this standard. That is, you could easily use multiple tools.