I've been thinking about the issue of synthesized audios and MIDIs for a while now. I have been eliminating all "Arrangements and Transcriptions" tabs from the audio files section as I come across them. In a strict sense, all such computer-generated files, regardless of file format, are arrangements - even those made from a notation file of the original version of a piece. Thus far, I have been placing the original instrumentation at the top of the "Synthesized/MIDI" tab and following the order used for scores in the "Arrangements and Transcriptions" tab for everything thereafter, using the level-4 headers (Complete, Selections, individual movements) as needed. For the 'original' versions, I've used the following type of level-5 description "For Organ (Composer)" - though I am starting to think it might be best to use something like "For Organ (Composer/<author of MIDI file>)" in light of the fact that very few files of this nature resemble the sound of the original work. Since the organization system we've been using for the "Arrangements and Transcriptions" tab of the scores section has been quite effective overall, I think a similar schema could be adopted for the audio section of the page. Other comments and observations are always welcome naturally.