Re: Creating a coding system

[Eli Zaretskii]

> From: David Kastrup <address@hidden>
> Cc: address@hidden,  address@hidden
> Date: Sat, 20 Dec 2014 20:06:45 +0100
> 
> Now the first iteration would be just using the pitches from a Midi
> keyboard.  The second iteration would then try working with durations.
> Either by putting time stamps on the events as they trundle in, or by
> reading from a "cooked" Midi stream already containing encoded time time
> stamps.
> 
> Conversion of time stamps to musical durations, particularly when the
> time stamps have not been generated by a notation program but by a human
> player, is non-trivial and would hopefully end up as an incremental
> process where a human corrects durations and Emacs improves its overall
> guesswork.
> 
> But time stamps are for another time.  Right now I'd be glad just to
> convert the pitches from they keyboard into LilyPond's pitch notation in
> order to make key entry faster.

I might be mistaken, but this doesn't look to me like a job for a
coding-system.  You are talking about parsing input into some abstract
notation, then generating a representation of that input in a
different language.  This is sufficiently different from converting
characters from one encoding to another that you should perhaps look
at cedet/semantic/ stuff instead.