On 2017-07-05, Martin Dupras wrote:
I've deployed a 21-speaker near spherical array a few days ago, which I think is working ok, but I'm having difficulty [...]
Oh, and by the way, *please* compensate each speaker for 1) its propagation delay to the central sweet spot, and also 2) its frequency and distance dependent proximity effect. Both compensations can be done analytically, with the second one being par of the course for close range, domestic POA setups of the old kind. In that circuit the first one is more or less subsumed or at least approximated by the second one already. However if you *do* happen to use speakers at widely varying distances from the sweet spot, and you *do* happen to be able to do modern digital correction, *do* correct for absolute delay as well. It *will* make a difference, especially at the lowest orders. After all, you just said you're working with a "near-spherical array"; pretty much by definition that means not all of the speakers experience equal propagation delay towards the sweet spot...
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