The Disquiet Junto is doing an alternate tunings prompt for week 0440 (very apropos!).
I’ve done several pieces before using Balinese slendro and pelog tuning, most notably Pemungkah, for which this site is named. I wanted to do something different this time, using Terry Riley’s tuning from The Harp of New Albion, using Logic Pro’s project tuning option.
The original version was a retuning of a Bosedorfer grand to a modified 5-limit tuning:
However, Logic’s tuning feature needs two things to use a tuning with it:
- Logic’s tuning needs to be based on C, not C#
- The tuning has to be expressed as cents of detuning from the equal-tempered equivalent note.
This leads one to have to do quite a number of calculations to put this in a format that Logic will like.