post #1 of 1
Thread Starter 

Working with Electri-Q, there are many modes the equalizer works in. It is consensus that "Linear" is the best for our purposes.


Within Linear mode, new peak types open up. Namely, S-Plane.


From the manual:


The  S-Plane   filters   are  the   most  analog   filter
types. Directly derived from the analog reference,
the frequency response is absolutely exact. And
since the analog domain doesn’t know about the
nyquist frequency, it is especially exact near the
half sample rate. This way higher frequencies are
boosted/attenuated symmetrically like it is done
with analog filters.
It   is   recommended   to   use   these   filter   types
instead of the ‘Basic’ ones.


Let me get this straight. Using S-Plane filters causes the driver to move differently, in the same way as if I were to add mechanical resistance or freedom to the driver, such as straight-up redesigning it to have a flat frequency response in the first place? If I correct it to flat response using only S-Plane filters, does the driver now move in the same way as if it were an electrostatic one? (Saving for distortion from ideal introduced by the fact that it is an imperfect dynamic and not an electrostatic driver)


Imagine if an audio file had data encoded within it. Playing it unequalized on any system (flat or not), and rerecording it with an ideal microphone would yield the same data. Applying non-linear equalization to the system would distort the data due to phase-shifts. Applying linear equalization with Type 1 filters should preserve it, as it should make the equalized system a copy of an unequalized system (or it seems). Is this piece implying that actually, type 1 filters are not working the ideal way, and the S-plane filters would preserve this encoded data, no matter what or how it was encoded (as if the system's physical mechanical properties [analog?] have been changed)?


A note to make is the performance right at the nyquist frequency. Is this high frequency accuracy the notable difference here?