I have an Optoma EH515 projector and I want to hardwire connect it to a Samsung HW-Q70T Soundbar. The Soundbar has digital optical sound and HDMI in, but the projector only has Aux sound out. How can I hardwire connect the audio from the projector to the soundbar? I tried a wireless bluetooth transmitter before, but the audio and video were not in sync. Please, your suggestions? Thank you.