You can easily export audio data from Capella music sheets (.cap) and save it as MIDI (.mid, .midi) files. You can download the software from the programs main website for free, so check it out.
Convert Capella music sheet data file to MIDI-sequention sound.
We found one software available in the database for this conversion.
Microsoft Windows software - convert cap to midi on Windows
A music notation software
Convert from cap file format
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.