FloraC
Joined 30 March 2020
→Fractional-octave temperament pages: Said thanks |
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:: Thank you, I appreciate your reply :) I will go ahead with those changes now. --[[User:BudjarnLambeth|BudjarnLambeth]] ([[User talk:BudjarnLambeth|talk]]) 07:14, 5 December 2024 (UTC) | :: Thank you, I appreciate your reply :) I will go ahead with those changes now. --[[User:BudjarnLambeth|BudjarnLambeth]] ([[User talk:BudjarnLambeth|talk]]) 07:14, 5 December 2024 (UTC) | ||
== Subsets and Supersets af AFDOs (Pages AFDO, 2afdo, 3afdo, …n-afdo) == | |||
Flora, you have put so much effort and time into maintaining and editing the ''AFDO'' pages - thank you for that. | |||
There is one aspect of these pages that I'm not sure I understood correctly, so I'll just address my question directly to you. It's about the terms ''subset'' and ''superset'' of an AFDO. | |||
On the ''2afdo'' page we read:<br> | |||
2afdo ''“is a superset of 1afdo (equivalent to 1edo) and a subset of 3afdo”''.<br> | |||
Can 2afdo be a subset of 3afdo when no intervals are shared (except the octaves)? | |||
Similarly, the ''3afdo'' page explains...<br> | |||
3afdo ''“is a superset of 2afdo and a subset of 4afdo”'',<br> | |||
but neither has any intervals in common with 3afdo (except octaves). | |||
The AFDO page tells us that in general...<br> | |||
''“All AFDOs are subsets of just intonation, and up to transposition, any AFDO is a superset of a smaller AFDO and a subset of a larger AFDO (i.e. n-afdo is a superset of (n - 1)-afdo and a subset of (n + 1)-afdo for any integer n > 1).”''<br> | |||
As you may have noticed I’m not convinced that the example given is correct. | |||
I've been playing around with overtone scales for a while now, in order to construct a prototype keyboard with dynamic intonation control. Personally I would summarize my experience with this project as follows: | |||
• To create a '''superset''' of an n-afdo , I’d multiply ''n'' by a (preferably small) integer number including 2 (i.e. 9-afdo is a superset of 3-afdo). | |||
• To create a '''subset''' of an n-afdo , I’d divide ''n'' by any of its prime factors | |||
(i.e. 5-afdo and 3-afdo are both subsets of 15-afdo). | |||
Your comment is very much appreciated – thanks for your time.<br> | |||
All the best --[[User:Holger Stoltenberg|Holger Stoltenberg]] ([[User talk:Holger Stoltenberg|talk]]) 11:35, 12 December 2024 (UTC) | |||