User Guide

Issue฀3,฀November฀2016฀ Model฀74/75฀User฀Guide฀
Page฀20฀ Studio฀Technologies,฀Inc.฀
for Surround
multiple฀channels฀can฀be฀simultaneously฀
“soloed,”฀allowing฀those฀channels฀to฀be฀
monitored฀at฀the฀same฀time.฀Other฀opera-
tors฀may฀prefer฀the฀exclusive฀solo฀mode.฀
When฀this฀mode฀is฀selected,฀only฀one฀
channel฀can฀be฀selected฀for฀solo฀at฀a฀time.฀
The฀additive฀solo฀mode฀is฀the฀default฀฀
setting.
Power-Up฀Mute฀All
By฀default,฀upon฀application฀of฀AC฀mains฀
power฀the฀monitor฀outputs฀remain฀muted฀
after฀the฀system’s฀power-up฀sequence฀
has฀been฀performed.฀Then฀an฀operator฀
must฀manually฀press฀the฀mute฀all฀button฀
to฀enable฀the฀monitor฀outputs.฀There฀may฀
be฀cases฀where฀having฀the฀monitor฀output฀
channels฀return฀to฀their฀respective฀states฀
as฀left฀at฀the฀time฀of฀the฀previous฀loss฀of฀
AC฀mains฀power,฀allowing฀normal฀opera-
tion฀automatically฀to฀resume.
Level฀Control฀Response
As฀expected,฀the฀level฀control฀on฀the฀Model฀
75฀Control฀Console฀is฀used฀to฀adjust฀the฀
output฀level฀of฀the฀monitor฀output฀channels.฀
The฀amount฀of฀rotation฀required฀to฀reach฀
a฀specific฀level฀can฀be฀selected฀from฀two฀
modes.฀This฀can฀be฀described฀as฀allowing฀
the฀“curve”฀or฀“taper”฀of฀the฀level฀control฀to฀
be฀configured.฀The฀two฀available฀modes฀
are฀true฀logarithmic฀and฀modified฀logarith-
mic.฀In฀the฀true฀logarithmic฀mode฀the฀level฀
control฀provides฀a฀precise฀logarithmic฀per-
formance฀over฀its฀entire฀rotation,฀e.g.,฀the฀
output฀level฀is฀half฀of฀its฀maximum฀when฀
the฀control฀is฀set฀at฀its฀midpoint,฀i.e.,฀50%฀
of฀its฀“travel.”฀In฀the฀true฀log฀mode,฀normal฀
listening฀may฀require฀the฀level฀control฀to฀฀
be฀set฀to฀approximately฀the฀“2-o’clock”฀
position.
Other฀users฀may฀be฀more฀comfortable฀
with฀the฀response฀given฀by฀the฀modified฀
logarithmic฀mode.฀This฀provides฀a฀much฀
greater฀output฀level฀during฀the฀first฀50%฀of฀
the฀level฀control’s฀travel.฀When฀configured฀
for฀the฀modified฀log฀mode,฀normal฀listening฀
may฀require฀the฀level฀control฀to฀be฀set฀to฀
the฀11-฀or฀12-o’clock฀position.฀The฀modi-
fied฀log฀mode฀more฀closely฀matches฀the฀
monitor฀level฀control฀performance฀found฀in฀
many฀audio฀consoles.฀As฀such฀it฀is฀select-
ed฀as฀the฀default฀mode.
It’s฀important฀to฀note฀that฀changing฀the฀
level฀control฀response฀mode฀will฀impact฀the฀
reference฀level.฀Changing฀from฀modified฀
log฀to฀true฀log,฀or฀vice-versa,฀will฀change฀
the฀reference฀level.฀Technically,฀the฀math-
ematical฀value฀stored฀as฀the฀reference฀
level฀does฀not฀change,฀but฀the฀loudness฀
that฀is฀heard฀by฀the฀operator฀will฀change.฀
Be฀warned!฀Changing฀the฀level฀control฀
response฀may฀require฀the฀reference฀level฀
to฀be฀recalibrated.
Level฀Control฀Auto฀Mute฀All
The฀level฀control฀auto฀mute฀all฀function฀
automatically฀mutes฀the฀monitor฀output฀
channels฀whenever฀the฀rotary฀level฀control฀
is฀in฀its฀fully฀counterclockwise฀position.฀In฀฀
some฀applications฀it฀may฀be฀desirable฀to฀
disable฀this฀function.฀When฀disabled฀the฀฀
rotary฀level฀control฀adjusts฀the฀monitor฀
output฀level฀over฀the฀approximately฀72฀dB฀
range;฀no฀automatic฀muting฀takes฀place.
Reference฀Level
For฀audio-with-picture฀applications฀it’s฀฀
critical฀that฀mixing฀be฀done฀in฀reference฀฀
to฀a฀known฀monitor฀loudspeaker฀level.฀This฀
is฀often฀referred฀to฀as฀mixing฀to฀“85฀dB”฀on฀
the฀monitors.฀The฀Model฀75฀Control฀Con-
sole฀allows฀a฀precise฀monitor฀output฀level฀
setting฀to฀be฀stored,฀and฀then฀enabled฀by฀
pressing฀the฀button฀labeled฀Ref฀Level.฀฀