Big delay

[vanlooverenkoen]

I am experiencing a big delay when changing values from my midicontroller traktor kontrol f1 (mostly with faders and potentiometers). Is this normal or should the changes be instantly?

Do I need to handle my code in another thread? Or is the callback already in another thread? Maybe I am doing to much work in the callback? What do you think may cause this issue?

[tebjan]

hello, this sounds like the midi values firing faster than you process them. the midi input has a synchronization context on which the events are fired. but for simplicity i would just us a simple value field to store the latest values that you receive and read the values on your UI thread.

so in the midi event handler only do:
myValueField = midiValue;

and when you do your program logic:
DoSomethingWithTheLatestValue(myValueField);

that is a simple way to not block the event handler and it works because single values are thread safe...

[vanlooverenkoen]

And
DoSomethingWithTheLatestValue(myValueField);
Need to be called from a new thread or do I need to make a new thread in that method? Or is there something I'm still missing?

[vanlooverenkoen]

Because the UI needs to be updated immediately when the sliders and potentiometers are changed. I still need to do this in the callback?

myValueField = midiValue;
DoSomethingWithTheLatestValue(myValueField);

Or is the DoSomethingWithTheLatestValue(myValueField);
Called at a later time?

[vanlooverenkoen]

DoSomethingWithTheLatestValue(myValueField);

In a new thread did the trick :) thank you, stupid mistake