Wadia DECODING COMPUTER, Information And Operating Manual

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Wadia 9 DECODING COMPUTER
VOLUME: These keys allow the digital volume control level to be decreased or increased on
the Wadia 9 Decoding Computer. There are 100 discreet levels to this volume control varying
in size from l/5 dB to 1 dB per step. If the Wadia 9 is to be connected to a pre-amplifier to
adjust volume, then the level should be set at its maximum (100).
WADIA 5 & WADIA 9 DISPLAY ON/OFF: Some listeners prefer to listen in an environment
that is as dark as possible. There is some psycho-acoustic truth to the fact that when your
brain does not have to deal with the information presented to it by the sense of sight, it is
more capable of allowing the cues it is presented with through the sense of hearing to more
easily concentrate on the listening experience. By pressing this button the user can
extinguish the information window. The information in the window will re-illuminate whenever
a button is pressed that activates the display. Following about 5 seconds of illumination, the
display will once again go dark.
WADIA 5 & WADIA 9 INPUT SELECT: Pressing this button will scroll through (1, 2, 3, 1,
etc.) the three inputs of the Wadia 9.
WADIA 10 INPUT SELECT: Pressing this button will scroll through (1, 2, 3, 4, 5, 6, 1, etc.)
the six inputs of the Wadia 10.
LEFT and RIGHT FADE: Fade, for a digital volume control, is similar to Balance for an
analog volume control. Let us, for example, assume that you are listening at a level of 75 in
both channels (LEVEL LEFT 75, LEVEL RIGHT 75) and you would like to adjust the balance
between the left and right channels. By pressing the FADE LEFT button, the level of the left
channel will begin to diminish (LEVEL LEFT 74, LEVEL RIGHT 75; LEVEL LEFT 73, LEVEL
RIGHT 75; LEVEL LEFT 72, LEVEL RIGHT 75; etc.). Volume can then be adjusted with this
level offset (LEVEL LEFT 72, LEVEL RIGHT 75; LEVEL LEFT 73, LEVEL RIGHT 76; LEVEL
LEFT 74, LEVEL RIGHT 77; etc.). Finally, when you want to return the levels of both
channels to an equal setting, again using the above example, by pressing the FADE RIGHT
button the level of the left channel will rise until it is at the same level as the right channel
(LEVEL LEFT 75, LEVEL RIGHT 77; LEVEL LEFT 76, LEVEL RIGHT 77; LEVEL LEFT 77,
LEVEL RIGHT 77). Continuing to press the RIGHT FADE button would then cause the level
of the right channel to diminish (LEVEL LEFT 77, LEVEL RIGHT 76; LEVEL LEFT 77,
LEVEL RIGHT 75; LEVEL LEFT 77, LEVEL RIGHT 74; etc.).
TIME BASE CORRECTION: Pressing these two buttons once simultaneously calls the
INVERT, EMPHASIS, TIME BASE CORRECTED screen to the information window on the
front of the Wadia 9. Pressing them again toggles between the AUDIO MODE and the
VIDEO MODE.
During all purely listening sessions, the AUDIO MODE should always be in the signal path.
When watching a Laser Disc or other video format, which has a digital audio output that is
connected to the Wadia 9, the real amount of time that the audio signal is delayed as it goes
through the process of Time Base Correction in the AUDIO MODE may result in a
discrepancy between what is occurring visually on the screen and what is being heard
through the speakers. For this reason it is possible to change from the AUDIO MODE of
Time Base Correction circuit to the less time consuming VIDEO MODE of the Time Base
Correction circuit. Even when this is done, the input stage of the Wadia 9 operates in a
manner that is superior to the methods of re-clocking the digital signal that it receives by a
factor of 2500:1 over other commonly utilized methods.
Still, because we believe that all pure audio listening should be done with the AUDIO MODE
of the Time Base Correction circuit in the signal path, we have made it a two-button push to
get out of this mode, so that it is unlikely that you will remove it from the signal path
accidentally.
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