I've got Cambridge Soundworks S-300 rear surrounds that can be adjusted to direct, bi-pole and di-pole. I'm ready to calibrate the speakers. What do I set the speakers to when I calibrate? If I normally select di-pole for 5.1 movies and calibrate to that setting, what effect would there be when I listen to 5.1 music set to direct, or bi-pole? I assume I have to calibrate the volume to only one selection. Should I chose one and let the others be a compromise, or won't it matter that much? I've not seen this addressed before nor does my Avia disc mention it. Thanks.