Mercurial > dottes
changeset 349:1073829494e3
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 (2013-08-12) |
parents | b8ea9cfb3546 |
children | afca0a74893b |
files | makeCello.sh |
diffstat | 1 files changed, 25 insertions(+), 6 deletions(-) [+] |
line wrap: on
line diff
--- a/makeCello.sh Tue Aug 13 00:50:02 2013 +0100 +++ b/makeCello.sh Tue Aug 13 00:51:43 2013 +0100 @@ -13,10 +13,30 @@ exit 1 fi -# Transpose down (return 0) if bottom note was < C. +# 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. +# If lowest note is < C, transpose down 1 octave. +# 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. transposedowntwo() { - return $(($3 >= 100)) + if (($3 >= 104 && $2 <= 115)); then + return 0; + fi + if (($3 < 100)); then + return 1; + fi + over=$(($2 - 108)) + under=$((104 - $3)) + if (($over <= $under)); then + return 1; + fi + + return 0; } dir=`pwd` @@ -38,11 +58,10 @@ range=`./abcrange.py $filename` # Move down either one octave or two, depending on the range - # of the tune. If there are any notes below middle C, transpose - # down one octave. The default is to transpose down two octaves. - middle="d" + # of the tune. + middle="D" if transposedowntwo $range; then - middle="D" + middle="d" fi sed -e "/^ *K:/s/$/ clef=bass middle=$middle/" $filename > $outdir/$name.abc