Google assistant interact with SmartApp


Not a newbie to ST but very new to the developing side. I have @redloro’s smartapp controlling my russound home audio controller but would like to use Google Assistant to pass commands to the app to control it with voice. Will I need a new DTH or can I interact with the smartapp directly? I have been doing a lot of searching but apologize if I’ve just been searching with the wrong verbiage and the answer is ‘here’.
Any help developing this would be much appreciated! Back to the Groovy tutorial in the meantime…