metro crash when expand channel

[françois]

Sometimes metro crashes when expanding channel.
Would it be possible to create an auto save function ?

[Jerm]

Can you please give more detailed information. Can you repeat this problem consistently? Do you mean 'Expand by channel'? Do you have a sample MIDI file to use to reproduce this problem?

I have used expand by channel 100's of times and have never seen it crash.

What version of Metro are you using? What OS?

Please do not issue feature requests in the bug reports section. As you know there is a feature request section of this forum.

[françois]

no it's a random problem.
I will try do notice better when it will repeat. I've always got the last metro version, and under 10.3.9.

[Scoot]

I would say it's a fault in the midi file not Metro.
I've never had a problem expanding a file by channels.

[Jerm]

I would say it's a fault in the midi file not Metro.

Well I cannot see how it could be the MIDI file once it is imported. If this were the case it should be 100% repeatable.

[Scoot]

I have never quite figured how a type 0 file works............it is a bit of magic to get all the channels working in one track....and how the expansion knows where everything should go.

What does metro do in the case of SYSEX information, or data that is unfamilar to it? Just stick it onto another track?

[Jerm]

it is a bit of magic to get all the channels working in one track

It is really quite simple, no magic involved. MIDI events have channel information encoded in them. It is as if you took a bunch of different tracks in Metro and merged to new. This would give you one track with a bunch of different channels on them.

....and how the expansion knows where everything should go.

Go through each event and place the event on tracks 1 thru 16 based on the encoded channel information (this is a bit simplified but expresses the basic algorithm).

What does metro do in the case of SYSEX information, or data that is unfamilar to it?

Sysex, since it does not contain any channel information, is simply left on the original track. Note there are no other MIDI event types stored in Metro tracks, besides system exclusive, that does not have encoded channel information.