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Model 233 User Guide Issue 1, September 2007
Studio Technologies, Inc. Page 31
controls to be reversed. A third parameter
selects whether the headphone output
channels will maintain a minimum output
level or can be fully muted. In most cases
the headphone output will be configured
for stereo, rather than monaural, operation.
The following paragraphs will describe how
these controls will function in that scenario.
Level/Level Mode
When set to the level/level mode, the con-
trol on the far left and the control in the
center operate independently. Each control
sets the output level of one channel of the
headphone output. If configured to the
normal mode, the control on the far left is
used to adjust the level of the headphone
output’s left channel. The control in the
center is used to adjust the level of the
right channel. If configured to the reverse
left/right mode, the control on the far left
adjusts the headphone output’s right chan-
nel. The control in the center adjusts the
left channel.
When in the level/level mode, and the mini-
mum output level is set for –40 dB, turning
each control to its fully counterclockwise
position will place its respective output
level 40 dB below its maximum. This set-
ting ensures that talent will never be fully
“isolated” from potentially important cue
signals. If present on one of the Model
233’s inputs and assigned to the head-
phone channels, some audio signal will
always be present on the headphone
output. If set to the full mute mode, turning
each control to its fully counterclockwise
position will cause its respective output to
fully mute.
The Model 233’s level controls have a
mechanical step (detent) that is located
at the halfway (50%) position of their rota-
tion range. This is intended to serve as
an aid to Model 233 users. In an ideal
installation, setting the far left and center
controls to their detent position will result in
a comfortable headphone output level. The
user, in response to a changing operating
environment, can then move the controls to
get more or less level as desired. The de-
tent position will always remain as a useful
reference point. To achieve this condition
the audio level on the connected line inputs
may have to be calibrated as required. This
is somewhat counter to the usual mental-
ity of just providing the user with whatever
level comes up by default. Spending a few
extra minutes “trimming” the audio levels
can result in much happier and more pro-
ductive talent. As previously mentioned, a
level trim potentiometer is associated with
each line input. These may be helpful in
achieving the desired adjustment range
of these two level controls. Refer to the
Technical Notes section of this user guide
for details.
Level/Balance Mode
When set to the level/balance mode, the
control on the far left and the control in the
center operate together to adjust the head-
phone output level. The control on the far
left adjusts the overall level of both the left
and right channels. The balance control,
located in the center, adjusts the relative
left/right level balance. In this mode the
controls operate in a manner reminiscent
of a consumer audio amplifier or receiver.
If set to the normal mode, rotating the bal-
ance control in the counterclockwise direc-
tion reduces the level of the right channel,
providing the user with more perceived
level in the left channel. If set to the reverse
mode, rotating the balance control in the
counterclockwise direction reduces the
level of the left channel, providing the user
with more perceived level in the right
channel.