How to play/stream/cast sound and video separately to different devices

**What I have.** - Portable Projector with DLNA & Miracast functionality. - 5.1 Channel speaker with bluetooth. - Android devices version Marshmallow[6.0](Alternate devices with Lollipop[5.1] also available) **Current situation.** - Movie(Video & Audio) streamed to projector from android device via DLNA/Miracast - Stereo Output from projector to the 5.1 Channel Speakers. **Problem.** - 5.1 Channel Speakers becomes just stereo speakers. - Speaker placements dependent on placement of projector.(I want to fix them and not not move them). **What I am looking for.** - Stream **ONLY** the video playback to the projector from the android device via DLNA/Miracast. - Stream **ONLY** the audio playback from android device to 5.1 channel speakers via bluetooth. *Can this be done? is there any app available for the same?*