mirror of
https://github.com/sshlien/abcmidi.git
synced 2025-12-06 06:55:06 +00:00
abcMIDI-2020.07.06.zip
This commit is contained in:
Seymour Shlien
147
samples/temperament.abc
Normal file
147
samples/temperament.abc
Normal file
@@ -0,0 +1,147 @@
|
||||
%%splittune
|
||||
%%textfont Helvetica 14
|
||||
%%scale .9
|
||||
|
||||
|
||||
%%begintext obeylines
|
||||
=================
|
||||
temperamentlinear
|
||||
=================
|
||||
%%endtext
|
||||
%%begintext justify
|
||||
Microtone accidentals can be used along with temperamentlinear.
|
||||
|
||||
In that case, the accidental ratio is based on the new chromatic semitone size,
|
||||
defined as 7 fifths minus 4 octaves. (Run abc2midi with the verbose
|
||||
option (-v) to see the temperament values.)
|
||||
|
||||
As an exception, the microtonal deviation in cents can be represented
|
||||
by using denominator=100 in the accidentals. Example:
|
||||
%%endtext
|
||||
|
||||
X:1
|
||||
T:\%\%MIDI temperamentlinear - microtone accidentals in cents
|
||||
%%postscript /ft5475{M -3 3 RM 6 -6 RL 2 SLW stroke}def
|
||||
%%postscript /ft35939{2 copy ft0 M -7.5 -3 RM 12 F3 (7) show}def
|
||||
M:none
|
||||
K:C
|
||||
%%scale 1.3
|
||||
V:1
|
||||
%%MIDI program 17
|
||||
%%MIDI temperamentlinear 1200 702 %% Pythagorian tunings
|
||||
%%MIDI makechordchannels 3
|
||||
"^Pure;major;chord"\
|
||||
[C_22/100EG]8 y |\
|
||||
"^Pythagorian;major;chord"\
|
||||
[CEG]8 y ||\
|
||||
"^Pure;4:5:6:7;chord"\
|
||||
[C_22/100EG_141/100B]8 y |\
|
||||
"^Pythagorean;7-chord"\
|
||||
[CEG_B]8 y ||
|
||||
|
||||
%%newpage
|
||||
|
||||
%%begintext obeylines
|
||||
================
|
||||
temperamentequal
|
||||
================
|
||||
%%endtext
|
||||
%%begintext justify
|
||||
New command.
|
||||
|
||||
\%\%MIDI temperamentequal <ndiv> [octave_cents] [fifth_steps] [sharp_steps]
|
||||
|
||||
This commans sets a tempered scale defined by 'ndiv' equal divisions
|
||||
of 'octave_cents' (default is the octave = 1200 cents).
|
||||
|
||||
The optional parameter 'fifth_steps', if provided, is an integer that
|
||||
defines the size of the fifth in steps of the temperament.
|
||||
This sets where is the note G in the temperament.
|
||||
|
||||
When 'fifth_steps' is omited or 0 (zero), the program computes it
|
||||
as an approximation of the frequency ratio 3/1, minus the
|
||||
(possibly tempered) octave.
|
||||
|
||||
The optional 'sharp_steps' defines the meaning of the accidentals.
|
||||
'sharp_steps' is the number of steps between a natural note and
|
||||
a sharpened note (e.g. between =C and ^C).
|
||||
|
||||
By default, the size of a sharp/flat deviation is based on the
|
||||
size of the chromatic semitone in the specified temperament: 7 fifths minus
|
||||
4 octaves. The values in use in the temperament can be viewed
|
||||
by running abc2midi with the command-line option -v (verbose).
|
||||
|
||||
With temperamentequal (as with temperamentlinear), microtone accidentals
|
||||
are interpreted as fractions of the sharp size in the
|
||||
specified temperament, except if they use denominator=100, which
|
||||
defines microtonal deviations in cents.
|
||||
|
||||
The conventional temperament can be reset with the command temperamentnormal.
|
||||
|
||||
|
||||
See also: temperamentlinear, temperamentnormal, makechordchannels
|
||||
|
||||
|
||||
Example:
|
||||
%%endtext
|
||||
|
||||
X:2
|
||||
T:\%\%MIDI temperamentequal
|
||||
%%stretchlast 1
|
||||
M:none
|
||||
L:1/2
|
||||
K:C
|
||||
V:1
|
||||
%%MIDI program 44
|
||||
%%MIDI makechordchannels 3
|
||||
%
|
||||
%%text \%\%MIDI temperamentequal 7 1200 4 \% N.B.: fifth = 4 steps
|
||||
%%MIDI temperamentequal 7 1200 4 % N.B.: fifth = 4 steps
|
||||
"^Octave divided in 7 equal parts"\
|
||||
c d e f g a b c' & [I:MIDI=program 44] C8 | [CEGc]2 z |
|
||||
%
|
||||
%%text \%\%MIDI temperamentequal 17
|
||||
%%MIDI temperamentequal 17
|
||||
"^Octave divided in 17 equal parts"\
|
||||
=c ^/c ^c =d _/d _d =c & C7 | [CEGc]2 z |
|
||||
%
|
||||
%%text \%\%MIDI temperamentequal 22 \% N.B.: 1/3-sharps
|
||||
%%postscript /sh2{M 0 -5 RM 14 F3 (/) show}bind def
|
||||
%%postscript /sh258{2 copy M -7.5 -5 RM 14 F3 (\\) show sh0}bind def
|
||||
%%postscript /ft2{M 0 -5 RM 14 F3 (\\) show}bind def
|
||||
%%postscript /ft258{2 copy M -7.5 -5 RM 14 F3 (/) show ft0}bind def
|
||||
%%MIDI temperamentequal 22 % N.B.: 1/3-sharps
|
||||
"^Octave divided in 22 equal parts"\
|
||||
=c ^1/3c ^2/3c ^c =d _1/3d _2/3d _d =c & C8-C | [C_1/3EGc]2 z |
|
||||
%
|
||||
%%text \%\%MIDI temperamentequal 31
|
||||
%%MIDI temperamentequal 31
|
||||
"^Octave divided in 31 equal parts"\
|
||||
=c ^/c ^c ^3/c ^^c =d _/d _d _3/d __d =c2 & C12 | [CEGc]2 z |
|
||||
%
|
||||
%%text \%\%MIDI temperamentequal 19
|
||||
%%MIDI temperamentequal 19
|
||||
"^Octave divided in 19 equal parts"\
|
||||
=c ^c ^^c =d _d __d =c & C7 | [CEGc]2 z |
|
||||
%
|
||||
%%text \%\%MIDI temperamentequal 19 1205
|
||||
%%MIDI temperamentequal 19 1205
|
||||
"^Streched octave (1205 cents) divided in 19 equal parts"\
|
||||
=c ^c ^^c =d _d __d =c & C7 | [CEGc]2 z |
|
||||
%
|
||||
%%text \%\%MIDI temperamentequal 11 1200 7 1
|
||||
%%MIDI temperamentequal 11 1200 7 1
|
||||
"^Octave divided in 11 equal parts"\
|
||||
c __d _d =d ^d ^^d =e =g ^g ^^g =a =c' & C12 |
|
||||
%
|
||||
%%tex \%\%MIDI temperamentnormal
|
||||
%%MIDI temperamentnormal
|
||||
"^Conventional temperament: octave divided in 12 equal parts"\
|
||||
c _d =d ^d =e =f ^f =g ^g =a _b =b =c'2 & C14 |
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
Reference in New Issue
Block a user