Hi astranoc & others, I know the thread ist old, but for all people with the same problem: I also wanted to assign another device (not the tv, but my AVR) to the vol. up/down buttons. This is not possible in my Harmony 650 in the menü buttons, because it has an extra option for it, wich the 300 does not have: There are buttons on the top of my rc, called like "watch tv" and so on, which can be controlled by the menu "activities". astranoc´s Harmony ultimate has it, too. Chris´ 300 doesn´t. In this menu acitvities on different devices are mixed. So what I did: Add a new action "Kodi", added TV, the AVR, and the RasPi. Choosed the inputs. What happend (surprise!): I can not only switch on these three devices with the button "Kodi" (which I don´t need). But the effect is, that volume is controlled now in the AVR, all other buttons control OSMC/Kodi! You can also assign the actions manually to diffrent devices: Go to "Buttons", Buttons of the Remote Control: The pulldown-menu offers the possibility to change actions, too. best regards, urmel