Another app has most likely registered this key combination as a global hotkey, so it grabs the keys first. Pick a different combination, or change that hotkey in the app that uses it.
Why nothing happens
Screenshot, screen recording, chat and graphics driver apps often register key combinations (such as Ctrl+Alt+A) as global hotkeys. When you press one, Windows hands it straight to the app that registered it, so the Set hotkey window never receives it: the box keeps showing Press the key you want to use…, or shows only modifier keys such as Ctrl and Alt, and the letter or number key is never recorded (①).
While the Set hotkey window is open, RedFlower Soundboard pauses all of its own hotkeys, so the problem isn’t caused by another sound in the app.
What to do
- Try a different combination, such as a numpad number key, F1–F12, or Ctrl plus a number like Ctrl+1. Other apps rarely use these.
- To see which combinations are taken, click Hotkeys on the toolbar, then tick Show hotkeys used by other apps in Hotkeys in use at the bottom of the page (①). Keys in the Another app colour are taken by other software; hover over one to see the exact combination (②).
- If you must use that combination, change or turn off the hotkey in the settings of the app that uses it, then set it again here. Not sure which app it is? Close your open apps one at a time and try again.
Keys that can’t be used
- Win: most of Windows’ own shortcuts use Win, so pressing Win does nothing here and Win never appears in a combination.
- NumLock: it only turns the numpad on and off, so it can’t be a hotkey. Numpad number keys are recorded only while NumLock is on; the app turns it on for you when the Set hotkey window opens.
If a hotkey you’ve set doesn’t work when you press it, see Hotkeys not working, accidental triggers, conflicts.
