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Target Scale Low and High Freq – the software uses the frequencies between these to calculate
the avg. microphone level and this is used to adjust the target curve so it "floats' with the drive
level. These frequencies are usually selected to be in a flat portion of the measured curve.
Low and High Target Freq – the optimizer only works in the frequency range located between
these two points. Any frequencies outside this range are excluded from the optimization process,
allowing you to limit the range of optimization. For example, you may not want to try to optimize a
subwoofer flat to 20 kHz. Or, for instance, you might only want to optimize for a narrow area
between 100 Hz to 500 Hz. it's best to keep the low target frequency at the -3 db point of the
measured speaker. Trying to correct below this point usually leads to excessive boost at low
frequencies due to noise floor issues.
GATE TIME MS – the AMC uses the maximum length frequency (MLS) method to measured the
impulse response of each speaker. The impulse response is converted into frequency response by
using a FFT with a gated time window time. The length of the gate control the low frequency limit of
the measurement.
Grey preset buttons- the gray buttons along the bottom after optimization of the screen set the
target curve for many common setups
Note:
All frequencies values can be set by directly entering frequencies enter directly or by double
clicking the box and clicking any point on the frequency graph.
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