Re: quick question about LPF and HPF
Order has to do with rate of rolloff, not frequency. There are a lot of things that can be done with bandpass boxes and the overwhelming majority do not have a flat response within the passband but rather accentuate one frequency. Those that do have a really flat frequency response are either really efficient with a really narrow passband (still effectively accentuating a small frequency range) or are fairly inefficient but have a broader bassband.
The hpf and lpf referenced in the form are high pass *frequency* and low pass *frequency* not filter. The hpf should be the bottom of the passband and the lpf should be the top.
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