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Re: Phase align subs to mainsYou can certainly get a usable alignment, but you definitely cannot get it as good as it gets. You're making a number of compromises that are invisible to you. How do you choose relative timing between the balcony and the floor? Only one of them can be correct. I always use polarity, delay, and changes in the LPF of the sub bandpass to get the mains and subs to align over as wide a bandwidth as possible. You are forced to rely on the limited resolution available to you in the frequency domain. Maximum cancellation happens from 120° to 180°, pegging 180° exactly is pretty hard when that range is only 1/3 of the phase wheel - and there are plenty of other complications in the frequency domain from reflections to screw you up. Not to mention you have no way to tell if you're one or more entire periods off. Personally it seems like a waste of time to me when you can just get it right.
Re: Phase align subs to mains
You can certainly get a usable alignment, but you definitely cannot get it as good as it gets. You're making a number of compromises that are invisible to you. How do you choose relative timing between the balcony and the floor? Only one of them can be correct. I always use polarity, delay, and changes in the LPF of the sub bandpass to get the mains and subs to align over as wide a bandwidth as possible. You are forced to rely on the limited resolution available to you in the frequency domain. Maximum cancellation happens from 120° to 180°, pegging 180° exactly is pretty hard when that range is only 1/3 of the phase wheel - and there are plenty of other complications in the frequency domain from reflections to screw you up. Not to mention you have no way to tell if you're one or more entire periods off. Personally it seems like a waste of time to me when you can just get it right.
