Here's a way to make Stream Decks change dynamically depending on the title of a window.

EDIT: From SF3.6 you can do these dynamic changes straight from the new Title Window SF trigger.

So here's the way to create even more dynamic stream decks. I've made a "walk through" video how to do it, but the quick explanation is that a timer script will change the which deck from SF is being used.

In this example I'm only using window title, but you could also use, window size, or which menus are available.
So for me, I'll also have it change one of my stream deck depending on if I have MIDI or Audio selected, as I have different commands that are specific for those two groups.

Feel free to ask question about the code. Every line that starts with // can be deleted, as they just serve as explanations.

Here's the video:
https://youtu.be/PtCWhsdROLI

Here's the script from the video:

// Set the App ID for the program you want to switch with. 
var app = sf.ui.nuendo

// This starts the timer checking
sf.engine.runInBackground(function () {

    // This creates a variable that is used later 
    var lastFocusedWindowTitle = '';

    // When the loop is running then the following happens. THe loop stops when you no longer have the app in focus: 
    while (true) {

        // This checks for a user cancellation.
        sf.engine.checkForCancellation();

        // This will do so we check every 100 ms if there's been a "change"
        sf.wait({ executionMode: 'Background', intervalMs: 100, onError: 'Continue' });

        // this checks if our front most window is the app we sat in the top of the script. 
        if (sf.ui.frontmostApp.activeBundleID == app.activeBundleID) {

            // This sets a variable of the name of the front most window
            var focusedWindowTitle = sf.ui.frontmostApp.focusedWindow.title.value;

            // If the front most window name has changed we tell the script to do something. 
            //If we don't do this we will get a "chance" every time we loop, so every 100ms. 
            if (focusedWindowTitle !== lastFocusedWindowTitle) {

                // if the front most window contains the text "Direct Offline Processing"
                if (focusedWindowTitle.match('Direct Offline Processing')) {
                    // Input the command id for the deck you want to change to. 
                    sf.soundflow.runCommand({ commandId: 'user:ck0n8ndbf00067z10gdijie0j:ck0n8o2qm000c7z107k36pwic' })
                    sf.soundflow.runCommand({ commandId: 'user:ck0n8ndbf00067z10gdijie0j:ck0navw7j00137z10vjjnewvb' })
                }
                else if (focusedWindowTitle.match('Key Editor')){
                    // Could put another deck in here as well.
                } 
                // in all other cases we get a basic stream deck. 
                else {
                    sf.soundflow.runCommand({ commandId: 'user:cjy8bxtq10002r9101ln8soqf:cjy8byhp60003r9103eecqsxw' })
                    sf.soundflow.runCommand({ commandId: 'user:cjy8bxtq10002r9101ln8soqf:cjybe2r2n0000wp101hwlbahm' })
                }

                // Set the variable lastFocusedWindowTitle to the focues window, for the next loop.
                lastFocusedWindowTitle = focusedWindowTitle;
            }
        }
        // If the app we have in the start is not in focus then we break the loop.
        else
            break;
    }
});