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Well, I'll meed another look into it then. Apparently, the problem I fixed was not the one you observed.
If you give me instructions how to reproduce the problem, that would be really helpful.

The above issue is fixed in release 1.6.6

If (on some systems) you see the following error:
Error: /usr/lib/x86_64-linux-gnu/libstdc++.so.6: version `GLIBCXX_3.4.20' not found

please try to update the libraries:
sudo apt-get install libstdc++6

A new version is available at https://www.npmjs.com/package/jazz-midi

I have updated the demo at http://jazz-soft.net/demo/WriteMidiFile.html

Standard MIDI Files - read / write / play
Please check it out at https://jazz-soft.net/doc/JZZ/midifile.html

I have posted a brief example at https://www.npmjs.com/package/jzz-midi-smf
Will add another demo shortly.

Hopefully, within a month...

I think I know what was the problem. Hopefully it will be fixed in the next release.

The code you mentioned is out of date. I am working on a new API and I'm open to suggestions from the future users.

Apple is going to drop support for 32-bit applications.
So do we. Future Jazz-Plugin releases for Mac will be 64-bit only.

If there are any objections, please reply here...

Which version of JZZ.js are you using?
There were some WebMIDI API issues a few versions ago, but those should be fixed.

If you still have problems with the latest version then I'll have to buy a chromebook...

A new version (v1.6.4) is published at https://www.npmjs.com/package/jazz-midi
It has an important fix for MacOS.

The latest version is available at https://www.npmjs.com/package/jazz-midi

Thank you for letting me know.
I've just got a very similar notice at https://github.com/jazz-soft/JZZ/issues/3
Or, perhaps, that was also you?
I'm investigating the issue.

You observe this on Mac, correct?
I'll look into the issue...

Now available at https://github.com/jazz-soft/web-midi

MIDI Player extension for browsers has been released. Chrome / Opera: https://chrome.google.com/webstore/detail/midi-player/khppfbnjbaampmeeiocjhcodkklkcfjf Firefox: https://addons.mozilla.org/en-US/firefox/addon/midi-player Safari: it takes forever to get an extension listed at Apple Web Store... m...

You can synchronize all players by starting them together:
port.and(function() { player1.play(); player2.play(); player3.play(); });

I'll think how to enable measure count in the next player version.

You can insert a channel converter between the file player and the output port: var smf = new JZZ.MIDI.SMF(data); var player = smf.player(); var port = JZZ().or('Cannot start MIDI engine!').openMidiOut().or('Cannot open MIDI Out!'); var chan9 = new JZZ.Widget({ _receive: function(msg) { this.emit(ms...