Passeq Analog Code
®
Plug-in
13
Setting HF Boost, MHF-HF-Cut
Control Elements
The advantage of proportional Q as compared to constant Q
designs rests with the musically superior way it functions. The
wave energy which resides below the bell curve remains essen-
tially the same and in the process, retains the balance of high
frequencies in relation to the entire frequency spectrum as one
experiments with varying Q values. While it is true that one must
think independently of the scaled HF boost dB values in such cases
(because these only apply to a value of 1), the result is a simpler,
more musically sensible and worthwhile way to work that does not
require continual additional corrections.
MHF-HF Cut
The MHF-HF cut band is similar to a shelving filter that
can reduce higher frequencies in a wide bandwidth. It is
appropriately wide, beginning with 580 Hz and extending
to 19.5 kHz, a range of over 5 octaves and overlapping the
lowest, LF-LMF cut band by just about two octaves. With
it one can lower a very wide bandwidth and with the peak
mid range filters further reduce—or raise—specific ranges. The
process can result in the creation of very interesting curves. Here
the maximum cut is -14.5 dB, while the maximum boost reaches
+12.5 dB.
The Passeq is not limited to any one particular kind of application,
and, for example, is also especially well suited to processing indi-
vidual instruments in recording sessions. In such cases the wide
downward reaching MHF-HF cut band may be play an exceptional
role. Individual instruments can easily be cut upwards, either
to give them a more compact sound or when higher frequencies
might be supplied from different microphone—or because the mix
simply suggests it.