enf to midi conversion is almost certainly searched in the context of the export of Musitek SmartScore notations (ENF format) to MIDI format, especially in scenarios in which the users do not have access to the software.
Unfortunately, it looks like that .enf files are only supported in the original software, so you have to either use that software or find someone who owns a license and would be willing to make the export for you. Perhaps reaching out to the online community may help.
Updated: February 13, 2024