Comments (5)
Hi Thomas,
Yes, you need to reduce time divisions of both files to common value. You can take either ticks per quarter note of first file or second one. Or you can set new value that will cause minimum rounding error on delta-times processing.
I have plans on MIDI file merge tool, so thanks for your question. I'll increase priority of this task.
Max
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@unitybru Thanks for the code snippet!
Please note that this code will work only for files with the same time division and tempo. I still have plans on MIDI files merger tool, but currently I'm busy with a big task about supporting macOS in Devices API of the library.
Merging MIDI files requires more work in general case than it can be supposed :)
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Hi Max,
I realized the functionality this evening in my application- and it works.
Maybe - as you mentioned - you can realize it in the library in the future…..
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+1 for the ability to stitch MIDI files more easily.
For those who find this thread, here is how I did it. I had a list of MIDI files that I needed to append one after the other. The trick is to shift things before adding the chunks.
var fileNameOut = "myoutput.mid";
var midiFileOut = new MidiFile()
{
TimeDivision = midiFile.TimeDivision // copied from master file
};
// Add all parts after shifting them
long addedSoFarMicroseconds = 0;
foreach (var midiPart in lsToWrite) // lsToWrite is a list of MidiFile objects
{
var currentDuration = midiPart.GetDuration<MetricTimeSpan>();
midiPart.ShiftEvents(new MetricTimeSpan(addedSoFarMicroseconds));
midiFileOut.Chunks.AddRange(midiPart.Chunks);
addedSoFarMicroseconds += currentDuration.TotalMicroseconds;
}
midiFileOut.Write(fileNameOut);
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Starting with the 7.0.0 version you can use built-in Merger tool to merge MIDI files.
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