Mercurial > dottes
view makeWebAudio.sh @ 610:b20beaebc06b build-default-245
Automated merge with ssh://hg.cryhavoc.org.uk/dottes
author | Jim Hague <jim.hague@acm.org> |
---|---|
date | Fri, 04 Nov 2016 23:44:03 +0000 |
parents | cb7a4eff9d5b |
children | ce5c7214f9aa |
line wrap: on
line source
#!/bin/bash # # Make audio required for the website but not for the book. # They go into web/<book>. # if [ $# != 1 ]; then echo "Usage: makeWebAudio.sh <book dir name>" exit 1 fi dir=`pwd` booke=$dir/$1 builddir=$dir/web/$1 mkdir -p $builddir # Make MP3 and OGG files for the input .abc. Since we're listening to # a doorbell playing the tunes, go for lowest quality (and hence smallest) # MP3 and OGG. $1 is the input filename, $2 is optional args for timidity. makeaudiofiles() { name=`basename $1 .abc` abc2midi $1 -o $builddir/${name}.mid timidity -OwM $2 -o $builddir/${name}.wav $builddir/${name}.mid lame -m m -V 9 --quiet $builddir/${name}.wav $builddir/${name}.mp3 # Timidity can generate OGG directly. But we need to generate WAV # for lame, and oggenc produces smaller output. OGG is needed for # Firefox's audio tag. FF doesn't support MP3, some others support # MP3 but not OGG. oggenc -Q -q 0 -o $builddir/${name}.ogg $builddir/${name}.wav rm $builddir/${name}.wav } # Make audio for a new tempo for the abc file $1, giving the output files # the same name with a prefix $2. The new tempo is the original tempo # (120 used if not specified), multiplied by $3 and divided by $4. # These audio files are for Learner use; I've found that having the # chords thumping away can make it hard to distinguish the melody, so # arrange for timidity to mute everything except the melody track. makeaudiofortempo() { name=`basename $filename .abc` newspeedfilename="$2-${name}.abc" # Prepare new speed audio files. # The tempo is either a plain number, or <notelen>=<number>. tempo=`$dir/abcfield.py --field Q $1` if [ -z $tempo ]; then echo "Warning: $1 has no tempo. Using 120." tempo="120" fi pos=`expr index $tempo '='` numtempo=${tempo:pos} notelenprefix=${tempo:0:pos} # Calculate new tempo. newtempo=$(( ( $numtempo * $3 ) / $4 )) # Insert new tempo and delete old. Old may not exist, # so do this rather than overwrite. sed -e "/^Q:/d" -e "/^K:/aQ: ${notelenprefix}${newtempo}" $1 > $builddir/$newspeedfilename makeaudiofiles $builddir/$newspeedfilename --mute=0,-1 rm $builddir/$newspeedfilename } # Generate audio files and slow speed (currently half speed) audio files. find $booke -name "*.abc" | sort | while read filename do makeaudiofiles $filename # Now make 1/4, 1/2 and 3/4 speed audio. makeaudiofortempo $filename "veryslow" 1 4 makeaudiofortempo $filename "slow" 2 4 makeaudiofortempo $filename "littleslow" 3 4 makeaudiofortempo $filename "normal" 4 4 done