High value four byte Vs appear to not receive correctly

Question

This was discovered by olav-rossland post at https://mididesigner.com/qa/7974/negative-and-positive-sysex-values-in-one-slider-solved

The negative values in the four byte V case seem to be skipping by 16s instead of tracking the incoming midi message.

The same negative values in the three byte V case track correctly.

Use the attached layout on two iPads transmitting to each other to see this behavior.

I extended the negative values to -256, and the problem still occurs at that point.

Downloads: 950
High value four byte Vs appear to not receive correctly
Downloads: 489

Two byte misbehavior instance
Downloads: 461

Comments

This got me thinking that I had seen this once before.  I had given up pursuing this particular function, thinking that I had some sort of anomaly in by keyboard.  But using two iPads talking to each other, no keyboard involved, the same problem occurs.  This one uses two bytes, and again skips by 16 when the value is received.

I have not figured out what is common with the four byte instance where this occurs.

The sample file is up in the main question.

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Thanks for this! Is there any difference between your example and Olav's example?

https://mididesigner.com/qa/8026/report-error-mididesigner-with-bytes-negative-sysex-values

I'm guessing that if we fix for one the other will fall into line.

Thanks!

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The first example "should" be the same as his.  It was what I cobbled together to verify his problem.  The second example is different, a mis-behaving 2 byte version instead of four byte.

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Hey there, is there any chance that the latest Beta build solves these issues for you? I'm pretty sure you're already on the beta team.

Thanks in advance for checking,
Dan

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I have not been on the beta team, and don't know how to access the beta.

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That's funny... I'll add you now, watch for an email from TestFlight or Apple...

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Added you yesterday and sent you an email too, let me know if you got access to MD Next etc. Thanks!