TypeError: Cannot read property 'filter' of undefined

[nicobrinkkemper]

When I build my own version of this repo, everything works fine. I got it working trough docker on a windows machine. However, when I change the url to the .mid file, it fails. I'm not doing anything different, I just changed the url and allowed cross origin on the host. Perhaps you can help me out with this? It could be that something went wrong with my build.

MidiIO.js:111Uncaught (in promise) TypeError: Cannot read property 'filter' of undefined
at http://localhost/demo.5a7d88bb.js:7:17557
at Array.map (native)
at Function.ROpp.e.getAllTracks (http://localhost/demo.5a7d88bb.js:7:17149)
at http://localhost/demo.5a7d88bb.js:7:21947
(anonymous) @ MidiIO.js:111
ROpp.e.getAllTracks @ MidiIO.js:89
(anonymous) @ MidiIO.js:330

Which points to line:

noteOnValid: indexedTrack.channel_noteOn.filter(event => event.deltaTime > 0),

[rakannimer]

Hey,

Could you send me the link to the midi file ? Midi parsing is still a WIP, Some files might not be understood by the parser.

But if you give me the midi file to reproduce I might be able to help !

[nicobrinkkemper]

Hello again,

This is my file: https://raw.githubusercontent.com/nicobrinkkemper/Gher/master/nginx/gher.mid
It's a midi of an old (but powerful) meme. http://www.newgrounds.com/portal/view/398812

I think it has something to do with the request headers not being "audio/mid", but I could be mistaken. Will try again tomorrow.

Regards,

Nico

[rakannimer]

Cool ! will give it a shot asap and let you know :)
Cheers

[rakannimer]

Hey,

It looks like the midi file is corrupt, I couldn't open it with 3 different midi players.
And github is not recognizing it as a binary file.

How did you generate it ?

[nicobrinkkemper]

I think react orchestra can only handle specific midi files. I've tried a couple but they all fail. I believe because they have multiple tracks inside them. Could you tell me how you generated your files on mac? Thanks.

Works:
'https://storage.googleapis.com/gher-1ab43.appspot.com/beet1track-medium-fast.mid';

Wont work:
'https://storage.googleapis.com/gher-1ab43.appspot.com/air-man-s-stage.mid';
'https://storage.googleapis.com/gher-1ab43.appspot.com/beethoven_opus10_1.mid';
'https://storage.googleapis.com/gher-1ab43.appspot.com/gher.mid';

[rakannimer]

Hey!

Sorry for the late reply :) I want to rewrite the midi parsing for the library as soon as I get the time, I don't think it's production ready yet. I'm thinking of using @grimmdude's Midi parser and writer in future versions.

Meanwhile, if you want to use midi I think as long as you're using one track only the midi should behave as expected.

Cheers !