bad durations from haydn musedata file

[cuthbertlab]

bad durations from haydn musedata file

[mscuthbert]

Unfortunately, the parsing is correct. See: http://www.ccarh.org/publications/books/beyondmidi/online/musedata/record-organization/index.html#regular -- the duration in divisions can only occupy two spaces, and column 5 must be blank.

However, the theoretically perfect is the enemy of the actually useful, so I have added a patch that uses the number in column 5 ( python column 4 ) as part of the division if it is not blank. If it's not a number though then it will raise an Exception.

Running the test suite now and then committing. Thanks!

P.S. In testing, use "forceSource=True" in your converter.parse() call, which will not cache anything.

[craigsapp]

Walter happened to be in just now, and I checked with him. All of the Haydn string quartets are in the "Stage 1" MuseData format. Stage 1 is functionally equivalent to MIDI files. Stage 1 is the format into which data entry is entered via real-time performance (such as Finale HyperScribe). The Stage 1 files are then typically converted into Stage 2 MuseData files further edited for printing, with Stage 2 files being functionally equivalent to MusicXML files.

The confusion is that the duration field in Stage 2 files is in columns 6-9 (indexed from 1), while in Stage 1 files duration is stored in columns 5-8 (also indexed from 1). So in Stage 1 files, "rest168" is correct, but it would be "rest 168" in Stage 2 files. The main reason for this shift is to accommodate cue-sized rests in Stage 2 files, which are indicated by the tag "crest" (which takes up columns 1-5). Stage 1 files were not updated for "crest" since it is only intended for MIDI-level data entry (which has no need of cue-sized rests).

In other words, the example code should probably be (as Myke has done):

if self.stage == 1:
    divisions = int(self.src[4:7])
else:
    divisions = int(self.src[5:8])

Personally, I'd be tempted to convert all the old formats to musicxml and junk the old files.

That's great, particularly for Stage 1 files which also have complexities such as music in each new time signature will be placed in a separate file, etc. But you guys are also aware of the license agreement for MuseData files?:
http://musedata.ccarh.org/legal/lcr.html
Any exceptions should go through Eleanor Selfridge-Field ([email protected]).

[mscuthbert]

The permission to redistribute these files in music21 was cleared with ESF a long time ago and is acknowledged.