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The Cinema Rhapsody also permits you to adjust the PCM Scale
for audio inputs. This scale has two settings, one for AC-3 Modes
and another for Pro Logic Modes.
The PCM scale ranges from 0 to 255, with the factory default (Out
Of The Box Setup) set to 100.
PCM Scales acts much like a digital attenuator, the higher the level
(up to 127), the louder the sound. However, unlike other low to high
scales, this range is based on low points of 0 and 255, whereby 127
is the actual high end of the scale, right in the middle. As such,
when you start to increase the scale beyond 127, the sound will
become lower. Setting the PCM scale to either 0 or 255, nets the
same effect (no audio level).
PCM Scaling is mode specific. AC-3 modes, Pro Logic modes, and
Stereo modes permit PCM scaling. DTS modes do not have an
option to adjust the PCM scale factor as they are fixed. In order to
alter the PCM scales individually for each input, you will need to
engage the appropriate mode for an input prior adjusting the PCM
scales.
While 127 is the loudest PCM Scale setting, the PCM Scale setting
of 100 is the Cinema Rhapsody’s “out of the box” configuration.
ADA strongly suggests that you do not change these scales.
Adjusting the PCM Scales will raise or lower the level of each input.
If you wish to adjust the PCM Scale the following steps detail how
this is accomplished.
1
While in the Pro Setup Mode, turn the MODE knob until the
display reads either PCM SCALE and then press the
MODE knob. The Cinema Rhapsody’s display will read
PCM SCALE on the top line and the second line will read
a number followed by the words FOR AC-3 (for all AC-3
modes), FOR PROL (for all Pro Logic modes), FOR PCM
(for Stereo modes), and FIXED (for DTS Modes, you can
not alter DTS PCM scales).
2
Turn the MODE knob until the display reads the desired set-
ting for the PCM Scale that you have selected. Since
each Input that is on an either an AC-3 mode, Pro Logic
mode, or Stereo mode (not DTS) has its own PCM scale
setting, you can set the PCM Scales for other Input La-
bels by turning the INPUT knob, thus scrolling through all
inputs.
3
To exit the PCM Scale Setup Modes without leaving the Pro
Setup Mode, press the MODE knob. If you wish to exit
the Setup Mode completely, turn any of the knobs other
than MODE or INPUT.
Pro Setup - PCM Scale Factors
The Cinema Rhapsody
provides you with the ability
to alter the PCM Scales for
each input set to either an AC-
3 or Pro Logic mode. The
effect of altering the PCM
scale is the lowering of a
devices audio level. This
adjustment to the audio level
does come with a drawback
as the audio level is reduced
by discarding bits of data. As
such it is not ideal.
ADA strongly suggests not
altering the factory default
(Out Of The Box) settings for
the PCM scales.