Sony MDR DS4000 - Manual (Page 18)

Operation
18 GB
DECODE MODE indicator
The processor automatically identifies the format of the input audio signal and the
corresponding indicator lights up. Switch the audio between Dolby Digital, DTS, MPEG-2
AAC, etc., on the connected equipment (DVD player, etc.).
• DOLBY DIGITAL: Input signal recorded in the DOLBY DIGITAL format.
• DOLBY PRO LOGIC II: Analogue input signal, digital input PCM signal, or Dolby
Digital 2-channel signal processed by DOLBY PRO LOGIC II.
(If the sound field is set to ”OFF,” it is not processed by DOLBY PRO LOGIC II.)
• DTS: Input signal recorded in the DTS format.
• MPEG-2 AAC: Input signal recorded in the MPEG-2 AAC format.
Note
If the equipment connected to the DIGITAL IN jack is not playing back (fast forwarding,
rewinding, etc.), the DECODE MODE indicator may not light up correctly.
COMPRESSION Switch
Position of switch Playback Effect
OFF When the EFFECT switch is selected, the sound mode changes to the
selected effect.
ON This function maintains overall level of program material: explosive
sounds are attenuated while lower level sounds (dialogue, etc.) are
enhanced.
COMPRESSION
OFF ON
dynamic r
ange
dynamic r
ange
whisper, background noise
whisper, background noise
explosion
explosion
standard dialogue dialogue
input signal compression output signal
Illustration of the compression process
Dynamic range compression
by built-in DSP processor
Startling
level
Easy to hear
level
Difficult to
hear level