Access virus os4 Manual De Usuario

CHAPTER 

14

The Parameters

 HP     The high pass filter works 

in the opposite manner of the low 
pass filter: It suppresses the lower 
frequencies in a signal and lets the 
higher frequencies pass.

 BP    The band pass filter sup-

presses both ends of the tonal 
spectrum and allows only a nar-
rowly defined bandwidth of the 
original sound to pass.

 BS    The band stop filter, band 

reject filter or notch filter works in 
the opposite manner of the band-
pass filter. It allows all of the fre-
quencies of a signal except for a 
narrow frequency band around the 
cutoff to pass. The term “notch” is 
fairly descriptive; you might say 
this filter chops a notch out of the 
sound spectrum.

 ROUTING This feature offers 

four filter routing options which 
allow you to operate the filters in 
series or in parallel:

 SER-4    The filters are switched 

in series; with two poles each 
(12dB), both filters have the same 
slope for a total of four filter poles 
(24dB).

 SER-6    The filters are switched 

in series; Filter-1 has four poles 
(24dB), Filter-2 has two poles (12dB) 
so the overall slope is equivalent to 
six poles (36dB).

 PAR-4    The filters are switched 

in parallel and feature two poles 
each (12dB).

 SPLIT    The filters are switched in 

parallel and feature two poles each 
(12dB). Additionally, they receive 
independent input signal s (more 
on this later). The stereo position 
of the signals can also be manipu-
lated 
via the parameter TWIN MODE 
PAN SPREAD (see appropriate sec-
tion) in the EDIT menu.
Regardless of which FILTER ROUT-
ING option you chose, the SATURA-
TION

 stage is always post-Filter-1.