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annotate makeCello.sh @ 689:4ac5d00c1328

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Next from Nerys - La Roulante.
author Jim Hague <jim.hague@acm.org>
date Sat, 16 Sep 2017 23:09:15 +0100
parents cf2fe741a582
children ce5c7214f9aa
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cc2d4925f280 Produce a cello-friendly Booke.
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1 #!/bin/bash
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2 #
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3 # Copy a booke to cello-friendly form. Bass clef, transposed down
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4 # 1 or 2 octaves.
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5 #
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6 # It would be easier to do with transpose in dottes.fmt, but I can't get
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7 # that to work properly for a 2 octave downward transpose.
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8 #
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9 # This relies on abcm2ps >= 6.0 but does not check for it.
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10
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11 if [ $# != 1 ]; then
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12 echo "Usage: makeCello.sh <book dir name>"
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13 exit 1
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14 fi
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15
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16 # Return 0 if we should transpose down 2 octaves, 1 if just one
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17 # octave. $2 is highest note, $3 is lowest note.
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18 #
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19 # If range is G to d', transpose down 2 octaves.
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20 # Otherwise calculate the distance above d for the highest note on a one
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21 # octave transposition, and the distance below C on a two octave
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22 # transposition. Find the smallest, and use the corresponding
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23 # transposition, preferring 2 octaves in case of a tie.
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24 transposedowntwo()
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25 {
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26 if (($3 >= 104 && $2 <= 115)); then
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27 return 0;
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28 fi
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29 over=$(($2 - 108))
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30 if (($over < 0)); then
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31 over=0
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32 fi
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33 under=$((100 - $3))
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34 if (($under < 0)); then
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35 under=0
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36 fi
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37 if (($over < $under)); then
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38 return 1;
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39 fi
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40
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41 return 0;
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42 }
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43
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44 dir=`pwd`
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45
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46 booke=$dir/$1
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47 outdir=$dir/$1-Cello
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48
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49 mkdir -p $outdir
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50
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51 # Copy book component items.
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52 cp $booke/*.txt $outdir
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53
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54 echo "Cello" > $outdir/instrument.txt
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55
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56 find $booke -name "*.abc" | sort |
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57 while read filename
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58 do
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59 name=`basename $filename .abc`
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60 range=`./abcrange.py $filename`
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61
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62 # Move down either one octave or two, depending on the range
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63 # of the tune.
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64 middle="D"
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65 if transposedowntwo $range; then
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66 middle="d"
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67 fi
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69 sed -e "/^ *K:/s/$/ clef=bass middle=$middle/" $filename > $outdir/$name.abc
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70 done