Fake/synthesized curve
but the frequencies are useful. The curve is obviously synthesized from the frequency distribution, and not useful for measuring flickering/PWM of LED lights.Great free audio app
I needed to compare the distortion of 3 Samsung TV speakers to see which one(s) were bad. My tweeters were shot but the woofer was great. The reason for 4 out of 5 stars was I would have liked to be able to sync the signal so it would be stable.
But it cycled often enough that I was able to observe the speakers output.
But, for FREE it was great. If they offered an upgrade with sync, I would get it.