Do you guys think it's better to use the receiver's test tones, or an audio calibration disc? Because I've been reading conflicting things online about which is better. Or does it depend on the receiver? Another thing I read, which is new to me, the "expert" said to turn off your sub before calibrating the speakers. The only disc I have that calibrates audio is the old "Sound and Vision" Home Theater Tune Up disc. It has tests for Dolby Digital and DTS.