BSS Audio DPR-901II Owner's Manual - Manual (Page 5)

5
Features and Facilities
1.1 Features and
Facilities
The DPR-901ii is a four band parametric equaliser which varies the
degree of equalisation dynamically, as the program level changes. The
process can be thought of as frequency selective compression and/or
expansion, but it is fundamentally different to simple ‘frequency-con-
scious’ dynamics processing as used for noise gating, de-essing and the
like. It is also very different to the growing family of ‘sliding filter’ tech-
niques used in single-ended noise reduction processors. A split facility
allows the unit to be used as two separate two band units, and a side
chain listen button allows monitoring of the filter setup.
Frequency selective compression is equivalent to applying CUT on a
normal equaliser while frequency selective expansion is like applying
BOOST. However, the DPR-901ii can be more subtle as the process is
dynamic: it will only occur above (or below) the threshold you have set.
Some possible uses for the DPR-901ii technology can be:
! ! ! ! ! To selectively compress and/or expand, broad or narrow-band seg-
ments of program.
! ! ! ! ! To de-ess and de-pop.
!
! ! ! ! To add dynamic loudness control (eg. bass boost at low SPLs).
!
! ! ! ! To control SPL in a dynamic and frequency conscious manner.
!
! ! ! ! To enhance or ‘sweeten’ mixed programme.
!
! ! ! ! To improve voice intelligibility (without risking howlround or feed-
back).
! ! ! ! ! To enhance low level vocals.
!
! ! ! ! To correct for and/or guard against, bad microphone technique (by
unskilled performers).
And in common with other units in BSS Audio’s processor range, the
DPR-901ii features:
! ! ! ! ! Friendly rotary control knobs for all parameter adjustments.
!
! ! ! ! Excellent low level resolution to maintain subtle musical detail.
!
! ! ! ! Minimum phase and low group delay for any EQ setting.
!
! ! ! ! High headroom >+ 20dBu.
!
! ! ! ! Conservative drive capability into low impedances (down to 600
ohms) and long, highly capacitive cables.
! ! ! ! ! Automatic relay controlled signal bypass if mains power is discon-
nected or fails.
Altogether, the DPR-901ii will not degrade a conventional high quality
analogue signal processing chain, even when two units are inserted in
line with the composite stereo mix.