The native file format for iPhone ringtones is M4R. In order to use MIDI ringtones on your iPhone, you must first convert them to M4R. You can use iTunes and rename the resulting audio file to ...

Step 1: Many DAWs can convert audio into MIDI, and it's great for getting ideas out of your head and onto the screen super-quick, just by humming or singing. We'll show you how to do it in Ableton ...

Like so: For audio conversion, create an Application workflow and string together these two actions (found under the Music heading)—Encode To iTunes Audio and Import Files Into iTunes.