Re: Gis major key signature; Lily's key signature algorithm

[Hans Åberg]

> On 8 Feb 2018, at 13:53, David Kastrup <address@hidden> wrote:
> 
> Of course, organs are not
> really tuned equally tempered even now, but that's not because of a lack
> of competence.  

A factor might be the type of partials available: a Mainstage baroque organ 
patch does not have any partials besides octaves, meaning that it might be 
tuned quite freely, as opposed to the modern organ patch, which has a full 
5-limit spectrum. (These are recording of real organs.)

> Accordions are tuned by ear by good tuners, and those
> _are_ equal tempered as a rule.

That is for standard full size accordions. In cajun/zydeco music, Just 
Intonation or a meantone is popular. Here is a track with an Arabic music 
microtonal accordion:
  https://www.youtube.com/watch?v=fvp6fo7tfpk