The electrical outlet junction boxes will be on the outside of the drywall and not imbedded in the wall for better soundproofing.

I was trying to ask about the speaker wire orange conduits or the projector wiring conduits, which the wires will not completely fill up, of course the wires will pass through a wall plate, but there will be a gaps between the wires and the tubing conduit sides that I should fill with something like silicone or acoutiscal caulk?

Also may I pass the video signal to a receiver with component and the audio signal by HDMI since my projector doesn't have HDMI yet?