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Why would you start at 0 Hz? You can't change the respons, and how accurate is the measurement below 10 Hz? Most of the time the soundcard and mic is not liniair any more.
10 Hz is a better startingpoint if you ask me. (I understand that the software doens't provide this, that's why I asked if it was possible to change the value on a different level like the registry)
Also, a flexible starting point could be handy if you only want to measure the frequencies around the crossover frequency. You don't need a full sweep for that.
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The measurement below 10Hz is as accurate as your mic is accurate... and there are mics accurate below 10Hz.
I'm not sure why this is such a big deal. If you only want to see from 10Hz on up, simply set your graph axis limits from 10Hz on up to however far you want. It's as if anything below 10Hz wasn't measured.
You are only talking about a few seconds of extra sweep... it's not hurting a thing...
