Feature Request: Measurement 1+2

It would be nice, in ASIO to measure ch1+ch2 and then ch4. So not measuring 3 individual channels but ch1+ch2 being an option, so just specific to those 2 channels. Ideally, that would be less of a refactor.

John Mulcahy said:

You can set ch2 as the secondary output and ch1 as the main output.

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Is there a way to run Ch1 + ch2 + ch4 to see how my LR interacts with my Sub? The bass usually is mono and it would be helpful to test the crossover

John Mulcahy said:

Not from REW.

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Would trace arithmetic work (perhaps multiplication)? Or the alignment tool by combining 1+2 and then that combined with 4?