Need to try converting them to MIDI externally IF they fail jSymbolic extraction (but ONLY if they fail jSymbolic extraction)
- Does Music21 do MEI to MIDI conversion?
- If they are not valied MEI, then it's fine if they fail extraction, but need to be able to deal with any valid MEI that jSymbolic can't parse (e.g. because it contains new MEI that wasn't around when Tristano wrote jMei2Midi)
- If the converted file extracts, then the error log file should NOT include the original MEI file it comes from