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Extensive changes to improve NoteTrack display and (some) editing, NoteTrack playback via MIDI, and Midi-to-Audio alignment.

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rbdannenberg
2010-09-18 21:02:36 +00:00
parent f6327602e8
commit a1f0e5ed5b
96 changed files with 5679 additions and 3566 deletions
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22
lib-src/libscorealign/README.txt
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@@ -15,7 +15,12 @@ are estimated directly from pitch data without synthesis. A similarity matrix
is constructed and dynamic programming finds the lowest-cost path through the
matrix.
(some more details should be added here about handling boundaries)
The alignment can optionally skip the initial silence and final silence
frames in both files. The "best" path matches from the beginning times
(with or without silence) to the end of either sequence but not
necessarily to the end of both. In other words, the match will match
all of the first file to an initial segment of the second, or it will
match all of the second to an initial segment of the first.
Output includes a map from one version to the other. If one file is MIDI,
output also includes (1) an estimated transcript in ASCII format with time,
@@ -32,10 +37,15 @@ For Windows, open score-align.vcproj (probably out of date now -- please
Command line parameters:
scorealign [-<flags> [<period><windowsize><path> <smooth><trans> <midi>]]
scorealign [-<flags> [<period> <windowsize> <path> <smooth>
<trans> <midi> <beatmap> <image>]]
<file1> [<file2>]
specifying only <file1> simply transcribes MIDI in <file1> to
transcription.txt. Otherwise, align <file1> and <file2>.
Flags are all listed together, e.g. -hwrstm, followed by filenames
and arguments corresponding to the flags in the order the flags are
given. Do not try something like "-h 0.1 -w 0.25" Instead, use
"-hw 0.1 0.25". The flags are:
-h 0.25 indicates a frame period of 0.25 seconds
-w 0.25 indicates a window size of 0.25 seconds.
-r indicates filename to write raw alignment path to (default path.data)
@@ -44,6 +54,8 @@ scorealign [-<flags> [<period><windowsize><path> <smooth><trans> <midi>]]
(default is transcription.txt)
-m is filename to write the time aligned midi file (default is midi.mid)
-b is filename to write the time aligned beat times (default is beatmap.txt)
-i is filename to write an image of the distance matrix
(default is distance.pnm)
-o 2.0 indicates a smoothing window of 2.0s
-p 3.0 means pre-smooth with a 3s window
-x 6.0 indicates 6s line segment approximation
@@ -80,9 +92,9 @@ linear regression values. Next, a hill-climbing search is performed to
minimize the total distance along the path. This is like dynamic programming
except that each line spans many frames, so the resulting path is forced to
be fairly straight. Linear interpolation is used to estimate chroma distance
since the lines do always pass through integer frame locations. This approach
is probably good when the audio is known to have a steady tempo or be
performed with tempo changes that match those in the midi file.
since the lines do not always pass through integer frame locations. This
approach is probably good when the audio is known to have a steady tempo or
be performed with tempo changes that match those in the midi file.
Some notes on the software architecture of scorealign: