In FusionDsp you can mute left or right. So you can get a measure for each channels ( Of course, with no activ filter).
Such correction makes sense especially if your room is not symmetrical. Left and right speaker may need different corrections.
At the end, a last measure with both channel activated is needed to check the global result.
Measures are made from the listening point.
Thanks for that helpful advice regarding practicalities—I shall try! However, I remain suspicious. The wave-forms that arrive at our ears are sums of all the sonic information being passed to us, and our ears are only a few inches apart. Both ears hear both L & R speakers, whose sound has already summed before arrival. So, given a known tone, frequency amplitude and phase differences from both sides of the room are pre-summed. Intervening earlier (pre-summing) might introduce more error as additional harmonics will be missing. Hence my thoughts about testing it empirically.
My point of view: in room, due to geometry, furniture’s, material used, the response may be not the same for both speakers. Imagine your left speaker with a +6dB at 112Hz but right +3 at 67Hz.
Equalizing both the same way does not correct properly IMHO
My thinking was that what we would hear is a (brain performed) Fourier decomposition of the sum of those at our (relatively closely spaced) ears. An example might be the mid-range suckout that can occur through interference between left and right channels during recording. Correcting interference between left and right, which has already been compensated by the recording engineer, could lead to unpredictable results.
've now set up separate PEQ files for L and R, and the effect is an improvement in definition and stereo separation. So eating humble pie…
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Of course, that could be an expectancy effect following effort…
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