Yamaha DSP-A1 Owner's Manual page 49

To enjoy a video source encoded with
the Dolby Pro Logic Surround, the
Dolby Digital (AC-3) or the DTS
When you select the program No. 10, 11 or 12, and the input
signal of the source is 2-channel stereo, Dolby Pro Logic
Surround is decoded. When some program is selected and the
input signal of the source is encoded with the Dolby Digital (AC-
3), Dolby Digital (AC-3) is automatically decoded.
When some program is selected and the input signal of the
source is encoded with the DTS, DTS is automatically decoded.
The following indicators on the display panel show you what
sound processing is being made.
1
3
4
5
DIGITAL SOURCE
AC 3 DTS PCM
1
Lights up when a DVD source encoded with the DTS is
played back and the DTS is decoded.
2
Lights up when an LD source or a CD source encoded with
the DTS is played back and the DTS is decoded.
3
Lights up when the Dolby Digital (AC-3) is being decoded
and the signals of selected source encoded with the
Dolby Digital (AC-3) is not in 2-channels.
This indicator also lights up when the input mode is set to
"AC-3 RF" even if no signal encoded with the Dolby
Digital (AC-3) is input to this unit.
4
Lights up when the Dolby Pro Logic Surround is being
decoded
5
Lights up when the Digital Sound Field Processor is
turned on.
In addition, for the program No. 10, 11 and 12, the name of the
selected subprogram on the display panel or the monitor screen
will change according to the type of decoding. (For details, refer
to pages 53 to 54.)
Notes
The Dolby Digital (AC-3) will not be decoded to the source
that is not encoded with the Dolby Digital (AC-3).
The DTS will not be decoded to the source that is not
encoded with the DTS.
If the input signals of source encoded with the Dolby Digital
(AC-3) are in 2-channels only, the sound processing for them
is similar to that for analog or PCM audio signals.
2
DIGITAL
PRO LOGIC
DSP
Note
If you change the LD (or CD) being played back with the DTS
decoded to another disc not encoded with the DTS when the
red "dts" indicator is illuminated, playing back the newly
selected disc will output no sound. In this state, the red "dts"
indicator flashes to show that this unit is locked in the DTS-
decoding mode.
To play back the disc normally, change the current DTS-
decoding mode to another mode by pressing an input selector
key on the remote control transmitter or the INPUT MODE
button on the front panel so that the red "dts" indicator turns
off.
To cancel the effect sound
The EFFECT button on the front panel or the EFFECT ON/OFF
key on the remote control transmitter make it simple to compare
the normal stereo sound with the fully processed effect sound.
To cancel the effect sound and monitor only the main sound,
press the EFFECT ON/OFF key or the EFFECT button. Press
the EFFECT ON/OFF key or the EFFECT button a second time
to restore the effect sound.
Front panel
EFFECT
Notes
If the effect sound is canceled when signals encoded with the
Dolby Digital (AC-3) or the DTS are input to this unit, signals of
all channels are mixed and are output from the main speakers.
If the EFFECT button or the EFFECT ON/OFF key is pressed
to turn effect sounds OFF when the Dolby Digital (AC-3) or the
DTS is decoded, it may happen that sound is output faintly or
not output normally depending on a source. In that case, press
the EFFECT button or the EFFECT ON/OFF key to turn effect
sounds ON, or use input signals not encoded with the Dolby
Digital (AC-3) or the DTS.
If the EFFECT button or the EFFECT ON/OFF key is
pressed to turn effect sounds OFF when the Dolby Digital
(AC-3) is decoded, the sampling frequency and channel
formation of the decoded signal is shown on the display
panel.
ex.)
EFFECT OFF
fs=48k
Sampling frequency is
48 kHz.
* If the input source is a Dolby Digital KARAOKE source, "K"
is shown at the head of channel formation.
Remote control
EFFECT
or ON/OFF
in : 3/2
Three channels at the front
Two channels at the rear
47