I have a reciever with PEQ's namely yamaha htr 5790. Now when i first ran the autosetup on the reciever it checked and set speaker levels,distances and equalized the response to flat. After setting up the reciever i ran the DVE to calibrate my speaker levels with my SPL meter. Now that all my speaker levels are reset, would i need to again use the parametric equalizers? How exactly do they measure the room response?If i re apply PEQ, would it change the speaker volume levels too and would i notice a deviation if i ran the SPL tests again from DVE if i run PEQ again? Please advice.