Solidyne 562dsp, User Manual

Page: 27 / 44

SOLIDYNE 562
dsp - broadcast digital processor Page 27
perceived effect. Slow attack and moderate
release times are recommended for the low band
when SRS TruBass® is used. Please refer to
562dsp preset programs to learn how our
engineers have selected those settings.
4.4.6.2 SRS
®
(3D Enhancement)
The “3D” Stereo Image Enhancer uses two
algorithms that are in charge of the vertical and
horizontal image enhancement.
SRS Focus
®
(Vertical image): It expands the
sonorous image in the vertical plane; elevating the
perceived
height of the audio source
(loudspeakers).
Take in mind that this processing affects the
spectrum balance, sine you will note changes in
the general equalization when changing the
position of Focus control.
The Focus control has a scale marked in degrees,
correlating to the apparent elevation of the sound
source over the real position of the loudspeakers,
taking as a reference the horizontal plane.
This control affects the general equalization of the
signal; fundamentally reinforcing trebles; therefore
you will notice changes in the spectral balance
with different “Focus” positions. As the value is
increased, it increases the “brightness” and
“presence” of the sound. Observe the factory
presets as this control is combined with the
adjustments in the higher bands of the multi-band
compressor and Density EQ; in order to obtain
high frequency trebles with excellent definition.
SRS Width
®
(Horizontal image): SRS Width
®
algorithm processes the signal in such a manner
that
the spatial cues lost in the
record/playback/FM transmission process are
restored. Since the human hearing system is
involved and is actually part of the loop, its
transfer function is made a part of the system
transfer function. At the same time, SRS Width
®
processing avoids objectionable buildup of
frequencies where the human ear has increased
sensitivity (in the L-R channel). This algorithm is
also very effective over various listening locations
not just restricted to a favorable listening position
equidistant between the two speakers.
In a stereophonic signal, frontal sounds produce
equal amplitudes in the left and right channels and
are therefore present in the "sum" or L+R channel.
Ambient sounds that include reflected and side
sounds produce a complex sound field and do not
appear correlated in the left and right channels.
They are therefore present in the "difference" or L-
R channel. Although these two signals are
normally heard as a composite signal, it is
possible
to separate and process them
independently and then mix them again into a new
composite signal which contains the required
spatial cues that the stereo recording process did
not provide. The directional cues are mostly
contained in the difference channel, so these can
be processed to bring the missing directional cues
back to their normal levels. The difference channel
is processed by modifying the spectrally
equalization based on the HRTF (Hear Related
Transfer Functions) while it is also increased in
amplitude in order to increase apparent image
width.
The Width control determines the amount of 3D
processed signal that is applied to the original
audio signal. When set to “OFF” the processing is
defeated.
Any FM stereo broadcasting station transmitting
with SRS
®
3D Enhancement processing will pop-
up out of the dial by its “wider” sound. A sound
that will immerse the listener literally into the
music! This effect contributes to increase the
perceived loudness of the transmission. When
listening with headphones, 3D Enhancement is
impressive.
The sound seems to come
everywhere around the listener.
Images provided by SRS Labs
is a trademark of SRS Labs Inc, USA.
WOW
®
technology is incorporated
under license of SRS Labs, Inc, USA.