Denon AVR input

I have a Denon AVR 1912 up and running in HA.
I can select input as expected.
However, I want to be able to call one of the four “Quick Select” instead.

Here is part of the code I use to select the “SAT/CBL” input:

    action:
  - entity_id: media_player.denon_avr
    service: media_player.turn_on
  - entity_id: media_player.denon_avr
    service: media_player.select_source
    data:
      source: SAT/CBL
```

How can I call "Quick Select"?
Thought I should use: MSMSQUICK3<CR> or just QUICK3

At least at of last year, it wasn’t supported: Quick Select? · Issue #24 · ol-iver/denonavr · GitHub

If you dig through the integration or maybe the open and closed cases in that issue tracker, you might be able to manually use the quick select since it looks like the receiver knows about it: http://IP_ADDRESS/QuickSelect/index.html

Been reading up on the issues, you linked to.
But with no help. (at least with my skills)
Yes, you are right: The reciever knows about Quick Select.
I use it from the Dennon Android app.
Which lead me to think that it must be possible.