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Try to be cleverer when transposing for cello. Jane says: Am most comfortable between the bottom G (the bottom line of the bass clef) and top D (the note above middle C), but can play from bottom C upwards (the C string is a bit growly) and at a push can get as high as the A above middle C. Implement the following rule: 1. If range is G to d', transpose down 2 octaves. 2. If lowest note is < C, transpose down 1 octave. 3. Otherwise calculate the distance above d for the highest note on a one octave transposition, and the distance below G on a two octave transposition. Find the smallest, and use the corresponding transposition.
author Jim Hague <jim.hague@acm.org>
date Tue, 13 Aug 2013 00:51:43 +0100
parents b4a0161e8870
children cf2fe741a582
comparison
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348:b8ea9cfb3546 349:1073829494e3
11 if [ $# != 1 ]; then 11 if [ $# != 1 ]; then
12 echo "Usage: makeCello.sh <book dir name>" 12 echo "Usage: makeCello.sh <book dir name>"
13 exit 1 13 exit 1
14 fi 14 fi
15 15
16 # Transpose down (return 0) if bottom note was < C. 16 # Return 0 if we should transpose down 2 octaves, 1 if just one
17 # octave. $2 is highest note, $3 is lowest note.
18 #
19 # If range is G to d', transpose down 2 octaves.
20 # If lowest note is < C, transpose down 1 octave.
21 # Otherwise calculate the distance above d for the highest note on a one
22 # octave transposition, and the distance below G on a two octave
23 # transposition. Find the smallest, and use the corresponding
24 # transposition.
17 transposedowntwo() 25 transposedowntwo()
18 { 26 {
19 return $(($3 >= 100)) 27 if (($3 >= 104 && $2 <= 115)); then
28 return 0;
29 fi
30 if (($3 < 100)); then
31 return 1;
32 fi
33 over=$(($2 - 108))
34 under=$((104 - $3))
35 if (($over <= $under)); then
36 return 1;
37 fi
38
39 return 0;
20 } 40 }
21 41
22 dir=`pwd` 42 dir=`pwd`
23 43
24 booke=$dir/$1 44 booke=$dir/$1
36 do 56 do
37 name=`basename $filename .abc` 57 name=`basename $filename .abc`
38 range=`./abcrange.py $filename` 58 range=`./abcrange.py $filename`
39 59
40 # Move down either one octave or two, depending on the range 60 # Move down either one octave or two, depending on the range
41 # of the tune. If there are any notes below middle C, transpose 61 # of the tune.
42 # down one octave. The default is to transpose down two octaves. 62 middle="D"
43 middle="d"
44 if transposedowntwo $range; then 63 if transposedowntwo $range; then
45 middle="D" 64 middle="d"
46 fi 65 fi
47 66
48 sed -e "/^ *K:/s/$/ clef=bass middle=$middle/" $filename > $outdir/$name.abc 67 sed -e "/^ *K:/s/$/ clef=bass middle=$middle/" $filename > $outdir/$name.abc
49 done 68 done