Incorrect timestamp on other track

[TSKangetsu]

channel 5,6,7 doesn't look right, about 2 seconds delay here, this only appear in multiple channel

[TSKangetsu]

This mid file appears to have 2 BPM metadata，will this cause problems？

[alextekartik]

That could likely be the issue since I don't think I encounter this yet (and I think I have a single time signature per file). Would you be able to share the midi file so I can take a look?

[TSKangetsu]

we_shall_die_togetherunknown.zip

[alextekartik]

Indeed, it seems I need to handle the time signature slightly differently to handle this properly. I'll look into it and keep you posted

[alextekartik]

I don't see anything wrong with the file, indeed channel 6,7,8 start later. Just to understand, did you generate this file with this lib, do you have any problem playing it with a midi player or are you noticing something special I should look at?

[TSKangetsu]

I use flutter_midi_command to play it, when i remove 120bpm meta, only 140bpm, it play normally. If file has multiple bpm, some track won't play with correct time, file tracks 5、6、7 still get 120bpm timestamp

[TSKangetsu]

May be midi_file_player problem? I'm still checking the code.

[alextekartik]

Ok I think I understand, indeed midi_file_player assume a fixed time/tempo signature. I'll check how I can improve that.

[alextekartik]

Indeed the time computation in MidiFilePLayer was wrong when there was a bpm change. I think this is fixed