Pull the wires through the walls.
Cost to run speaker wire through ceiling attic.
Joysts seem to run with air vents transversing the space but if they are open then figure on 3 4 good size holes and 3 days added to the original work to float texture and paint.
Poke a reference wire through the ceiling then in the attic find the wire and measure over to find the center of the wall.
Running surround sound wires using crown moulding.
Cut the holes that the wire will pass through to enter and exit the attic.
Terminate the cables in low voltage electrical boxes.
Depending on what direction your joysts run and whether there is open web trussing when you stick a stud finder on the ceiling i would do anywhere from 500 1200.
Again plan how you want to run your cable.
If you will need to fish wiring through a wall drill a hole through the wood plate in the attic only.
Hole down through the top plate.
Depending on what the wiring is for this may be go through the drywall to the ceiling for instance for new lighting or be farther down on a wall.
Fish cables through existing walls with fish tape or a fish stick.
You will tuck the cabling above this piece of wood and it will also.
You want the simplest most direct route.
Install 1 2 furring strips on the wall around the perimeter of the room.
Is it unsafe to use non shielded speaker wire in the attic.
And use semi rigid.
Drop a weighted string through the hole.
I plan to run speaker wires for my ht through the attic.
Running audio video cables behind walls is similar to running electrical cables but a v cables should be at least a foot away from electrical cables to prevent interference.