MIDI files contain notes and instrument instruction for a playable song. As such only special audio editing / conversion software with proper instrument libraries and translation capabilities can convert MIDI files to actual audio files like the AAC (Advanced audio coding). So it is not much of conversion, more like generating *.aac audio file from *.midi source.
Convert MIDI-sequention sound to Advanced audio coding stream.
We have found 4 software records in our database eligible for .midi to .aac file format conversion.
Microsoft Windows software - convert midi to aac on Windows
A free, open source software for recording and editing sounds
Convert from midi file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned midi to aac. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
An audio editing software for Windows and Mac
Apple macOS / Mac OS X software - convert midi to aac on OS X
A multi-track audio editing tool
Linux/Unix software - convert midi to aac on Linux
Multi-track audio editor for Linux