Originally Posted by noah katz
Searched the thread and it seems that Bill is indeed the author.
Question for you, Bill:
I don't understand why there's a difference in the Bass Decay graph with the "adjust for response" option.
The decay is in dB relative to the original level, not in absolute Db SPL, right?
Also, can that graph be adjusted to go down to 10 Hz?
I can't answer a lot of questions (support is supposed to be through PE/DaytonAudio) but I can do a few. Most of the ones I've seen can be found in the Help file (or by just playing with the prog a little).
But the "adjust for response" thing is a little obscure. The decay is in units of time (milliseconds) needed for an initial level to decay by various dB amounts. "Adjust for Level" is a (somewhat empirical) way of including the actual response into the picture. For example, if you had 4000msec of decay time to decay by 5dB at 30Hz, but the frequency response were sunken down by a lot at 30Hz, then you probably don't care much about that decay time. If response were peaked there, though, big trouble.
The graph can be adjusted to display down to 10Hz, use the little yellow arrows below the lower graph. Data is only give for down to 12 Hz, though, if I remember right (don't have a mic here).