What do you mean??? ... to compare measurements??? :huh:It would be nice to be able to display a pair of curves in the Measurement screen, then click a "difference" curve. Similar to the "Separate the Traces" option.
It's not jumping at me what the usefulness of such a function would be...I know I can view multiple curves at once and visually compare them. But if the program could do the calculation and draw a third curve---the difference between the two---it would be great.
The difference-curve would display at its absolute dB value. Perfectly matching curves result in a difference that's a horizontal line at 0dB. Any variation between the original curves (call them A and B) shows up as bumps above/below the 0dB line.
Ooh...very nice insight. Thanks.To create a difference curve with REW, you need to first take a measurement and then save it is a calibration file. Then, you need to take the measurement again using the calibration file you just made.
Agreed. It's nice when doing A/B tests. I had a better (simpler) example, where I tested the same speaker using a different power amp. One of the amps was much flatter below 35Hz. There's where the difference curve would be good.Having an extra feature put into REW would be real nice though. Being able to measure differences probably wouldn't be very helpful for most of the REW users, but it is very useful for determining allowable tolerances when doing xover or driver design/OEM, etc...