Using a Roku streaming stick with volume controls (green box) and I want to add a ZVOX SB380 Aluminum Sound Bar TV Speaker with AccuVoice Dialogue Boost that has its own remote. Will I be able to sync these two remotes together?
Sorry but no. Only Roku wifi remotes control the stick directly. And roku remotes only control tv's directly. It would be upto the tv to control an audio device via hdmi-cec.