Lotro ABC's are fairly compatible to the original ABC standard, meaning that you won't have to worry about the way tones/chords are written in lotro-abc. However there is one big difference "X:" in lotro-ABC marks different tracks, while in the true ABC it's for different pieces entirely. So to open a lotro-ABC in a midi editor with ABC support you have to exchange all the X: by V: (for voice) and maybe add a X:1 upfront (not always necessary).
Originally Posted by Halgoreth
If your ABC was produced by Maestro however you have to do a lot more, because Maestro adds a lot of lines to those files that at least the reference implementation of ABC (abc2midi) does not accept. If you do those changes you can turn any ABC into a MIDI file again. I actually wrote a script that does most of the job, but I got annoyed by all the extra cases I needed to catch to free Maestro-ABC's from the garbage so I stopped it. But if you just need to do it for one file: go ahead and do it manually. You will find a binary of abc2midi somewhere on the web because it's open source software - and you probably need that tool to know where your lotro-ABC violates the standard, typical ABC import plugins just give you an unqualified error.
TLDR: any lotro-ABC can be turned back into a midi using abc2midi and some manual editing
The short answer to the original question is:
The difference of lotro-ABC and a standard ABC is the same than the difference of MIDI and lotro-ABC, as the ABC standard is designed as a human readable form of MIDI.
Last edited by SchorschiSchrumpf; Nov 06 2016 at 08:17 AM.
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