dottes/makeCello.sh

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#!/bin/bash
#
# Copy a booke to cello-friendly form. Bass clef, transposed down
# 1 or 2 octaves.
#
# It would be easier to do with transpose in dottes.fmt, but I can't get
# that to work properly for a 2 octave downward transpose.
#
# This relies on abcm2ps >= 6.0 but does not check for it.
if [ $# != 1 ]; then
echo "Usage: makeCello.sh <book dir name>"
exit 1
fi
# Return 0 if we should transpose down 2 octaves, 1 if just one
# octave. $2 is highest note, $3 is lowest note.
#
# If range is G to d', transpose down 2 octaves.
# Otherwise calculate the distance above d for the highest note on a one
# octave transposition, and the distance below C on a two octave
# transposition. Find the smallest, and use the corresponding
# transposition, preferring 2 octaves in case of a tie.
transposedowntwo()
{
if (($3 >= 104 && $2 <= 115)); then
return 0;
fi
over=$(($2 - 108))
if (($over < 0)); then
over=0
fi
under=$((100 - $3))
if (($under < 0)); then
under=0
fi
if (($over < $under)); then
return 1;
fi
return 0;
}
dir=`pwd`
booke=$dir/$1
outdir=$dir/$1-Cello
mkdir -p $outdir
# Copy book component items.
cp $booke/*.txt $outdir
echo "Cello" > $outdir/instrument.txt
find $booke -name "*.abc" | sort |
while read filename
do
name=`basename $filename .abc`
range=`./abcrange.py $filename`
# Move down either one octave or two, depending on the range
# of the tune.
middle="D"
if transposedowntwo $range; then
middle="d"
fi
sed -e "/^ *K:/s/$/ clef=bass middle=$middle/" $filename > $outdir/$name.abc
done