Re^3: utf8 hash keys revisited: How can i use musical symbols as hash keys?

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Re^4: utf8 hash keys revisited: How can i use musical symbols as hash keys? by RonW (Parson) on Oct 08, 2014 at 16:19 UTC
In this diagram, the octaves are designated by "ticks" following the note name. Your data set uses numbers, like in this other diagram. Maybe the diagrams are incorrect?	[reply]
Re^5: utf8 hash keys revisited: How can i use musical symbols as hash keys? by Jim (Curate) on Oct 08, 2014 at 20:17 UTC
The diagrams are correct. Read the third item in the list of Variations in the Wikipedia article titled Helmholtz pitch notation. I chose to use this variation of Helmholtz pitch notation in my example Perl script because it seems more well-suited to computer use and digital typography. One thing that troubled me is that there are no Unicode characters that are low versions of the high prime characters: PRIME U+2032 (′), DOUBLE PRIME U+2033 (″), TRIPLE PRIME U+2034 (‴), etc.	[reply]
Re^5: utf8 hash keys revisited: How can i use musical symbols as hash keys? by karlgoethebier (Abbot) on Oct 08, 2014 at 22:01 UTC
I think the original Helmholtz Notation for 440Hz/MIDI #69 is a′. Just a variation of this kind of notation is aš. In Scientific Pitch Notation this is A₄. "It is designated A₄ in scientific pitch notation because of the note's position as the fourth A key on a standard 88-key piano keyboard. On MIDI, it is note 69." Source And Jim wrote: aš,0,69,440.0000000000. Best regard, Karl ŤThe Crux of the Biscuit is the Apostropheť	[reply]


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