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Re: Intervals enharmony question
From: |
Hans Åberg |
Subject: |
Re: Intervals enharmony question |
Date: |
Mon, 30 Apr 2018 20:50:41 +0200 |
> On 30 Apr 2018, at 20:15, Jacques Menu Muzhic <address@hidden> wrote:
>
> Going a bit further, I bumped into this case.
>
> Since the note at some interval from another one keeps its pitch name in its
> different « variants », how about Db’s seconds?
>
> diminished second Ebbb ???
> minor second Ebb
> major second Eb
> augemented second E
>
> I’m sure no one ever uses triple flats though, must have missed something…
Use the two-dimensional keyboard layout below, extending them as necessary: Put
in a chord which you know, and transpose it, or move from the one diagram to
the other. A seven-note diatonic scale will always have all seven note names.
^ #
/
. -> M
/ \
b v v m
where M (resp. m) is the major (resp. minor) second, and the
the sharp # (resp. flat b) raises (resp lower) with the interval
M - m, that is, the difference between the major and minor seconds.
Resulting key pattern, in a scale using names A B C D E F G:
C# D# E#
C D E F# G# A# B#
Cb Db Eb F G A B
Fb Gb Ab Bb C'
In terms of traditional interval names, writing
P pure
M major
m minor
A augmented
D diminished
plus numbers: 1st, 2nd, etc., this is
A1 A2 A3
P1 M2 M3 A4 A5 A6 A7
D1 m2 m3 P4 P5 M6 M7 A8
D2 D3 D4 D5 m6 m7 P8
D2
>> Le 30 avr. 2018 à 15:50, Hans Åberg <address@hidden> a écrit :
>>
>>
>>> On 29 Apr 2018, at 22:17, Jacques Menu Muzhic <address@hidden> wrote:
>>>
>>> OK, now everything is clear, it’s precisely on jazz chords I’m working.
>>
>> FYI, I recall the Mehegan books on jazz improvisation applying enharmonic
>> equivalents freely. The Blatter books on instrumentation suggests applying
>> them to simplify for harpists, which will save time and money. But
>> orchestral instruments depart from Pythagorean tuning, not E12, so they are
>> not equivalent, differing by a comma of about 20 cents.
- Intervals enharmony question, Menu Jacques, 2018/04/29
- Re: Intervals enharmony question, Lukas-Fabian Moser, 2018/04/29
- Re: Intervals enharmony question, Jacques Menu Muzhic, 2018/04/29
- Re: Intervals enharmony question, Torsten Hämmerle, 2018/04/29
- Re: Intervals enharmony question, Jacques Menu Muzhic, 2018/04/29
- Re: Intervals enharmony question, Hans Åberg, 2018/04/30
- Re: Intervals enharmony question, Jacques Menu Muzhic, 2018/04/30
- Re: Intervals enharmony question,
Hans Åberg <=
- Re: Intervals enharmony question, Torsten Hämmerle, 2018/04/30
- Re: Intervals enharmony question, Wols Lists, 2018/04/30
- Re: Intervals enharmony question, David Kastrup, 2018/04/30
- Re: Intervals enharmony question, Hans Åberg, 2018/04/30
- Re: Intervals enharmony question, Malte Meyn, 2018/04/30
- Re: Intervals enharmony question, Hans Åberg, 2018/04/30
- Re: Intervals enharmony question, Hans Åberg, 2018/04/30
- Re: Intervals enharmony question, Malte Meyn, 2018/04/30
- Re: Intervals enharmony question, Hans Åberg, 2018/04/30
- Re: Intervals enharmony question, Hans Åberg, 2018/04/30