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Have learner tunes play only the melody. Do this by telling timidity to mute all tracks but the first.
author Jim Hague <jim.hague@acm.org>
date Tue, 06 Sep 2016 20:48:32 +0100
parents f1c4abe4fc75
children ce5c7214f9aa
comparison
equal deleted inserted replaced
566:912d53652d8d 567:cb7a4eff9d5b
16 16
17 mkdir -p $builddir 17 mkdir -p $builddir
18 18
19 # Make MP3 and OGG files for the input .abc. Since we're listening to 19 # Make MP3 and OGG files for the input .abc. Since we're listening to
20 # a doorbell playing the tunes, go for lowest quality (and hence smallest) 20 # a doorbell playing the tunes, go for lowest quality (and hence smallest)
21 # MP3 and OGG. 21 # MP3 and OGG. $1 is the input filename, $2 is optional args for timidity.
22 makeaudiofiles() 22 makeaudiofiles()
23 { 23 {
24 name=`basename $1 .abc` 24 name=`basename $1 .abc`
25 25
26 abc2midi $1 -o $builddir/${name}.mid 26 abc2midi $1 -o $builddir/${name}.mid
27 timidity -OwM -o $builddir/${name}.wav $builddir/${name}.mid 27 timidity -OwM $2 -o $builddir/${name}.wav $builddir/${name}.mid
28 lame -m m -V 9 --quiet $builddir/${name}.wav $builddir/${name}.mp3 28 lame -m m -V 9 --quiet $builddir/${name}.wav $builddir/${name}.mp3
29 # Timidity can generate OGG directly. But we need to generate WAV 29 # Timidity can generate OGG directly. But we need to generate WAV
30 # for lame, and oggenc produces smaller output. OGG is needed for 30 # for lame, and oggenc produces smaller output. OGG is needed for
31 # Firefox's audio tag. FF doesn't support MP3, some others support 31 # Firefox's audio tag. FF doesn't support MP3, some others support
32 # MP3 but not OGG. 32 # MP3 but not OGG.
36 } 36 }
37 37
38 # Make audio for a new tempo for the abc file $1, giving the output files 38 # Make audio for a new tempo for the abc file $1, giving the output files
39 # the same name with a prefix $2. The new tempo is the original tempo 39 # the same name with a prefix $2. The new tempo is the original tempo
40 # (120 used if not specified), multiplied by $3 and divided by $4. 40 # (120 used if not specified), multiplied by $3 and divided by $4.
41 # These audio files are for Learner use; I've found that having the
42 # chords thumping away can make it hard to distinguish the melody, so
43 # arrange for timidity to mute everything except the melody track.
41 makeaudiofortempo() 44 makeaudiofortempo()
42 { 45 {
43 name=`basename $filename .abc` 46 name=`basename $filename .abc`
44 newspeedfilename="$2-${name}.abc" 47 newspeedfilename="$2-${name}.abc"
45 48
56 # Calculate new tempo. 59 # Calculate new tempo.
57 newtempo=$(( ( $numtempo * $3 ) / $4 )) 60 newtempo=$(( ( $numtempo * $3 ) / $4 ))
58 # Insert new tempo and delete old. Old may not exist, 61 # Insert new tempo and delete old. Old may not exist,
59 # so do this rather than overwrite. 62 # so do this rather than overwrite.
60 sed -e "/^Q:/d" -e "/^K:/aQ: ${notelenprefix}${newtempo}" $1 > $builddir/$newspeedfilename 63 sed -e "/^Q:/d" -e "/^K:/aQ: ${notelenprefix}${newtempo}" $1 > $builddir/$newspeedfilename
61 makeaudiofiles $builddir/$newspeedfilename 64 makeaudiofiles $builddir/$newspeedfilename --mute=0,-1
62 rm $builddir/$newspeedfilename 65 rm $builddir/$newspeedfilename
63 } 66 }
64 67
65 # Generate audio files and slow speed (currently half speed) audio files. 68 # Generate audio files and slow speed (currently half speed) audio files.
66 find $booke -name "*.abc" | sort | 69 find $booke -name "*.abc" | sort |
68 do 71 do
69 makeaudiofiles $filename 72 makeaudiofiles $filename
70 73
71 # Now make 1/4, 1/2 and 3/4 speed audio. 74 # Now make 1/4, 1/2 and 3/4 speed audio.
72 makeaudiofortempo $filename "veryslow" 1 4 75 makeaudiofortempo $filename "veryslow" 1 4
73 makeaudiofortempo $filename "slow" 1 2 76 makeaudiofortempo $filename "slow" 2 4
74 makeaudiofortempo $filename "littleslow" 3 4 77 makeaudiofortempo $filename "littleslow" 3 4
78 makeaudiofortempo $filename "normal" 4 4
75 done 79 done