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23
Using Inserts
In addition to using Auxiliary sends and returns to access outboard devices, the
MPL 1204 also provides channel inserts for each of its twelve input channels.
These should be used when you want to affect just one input signal, as opposed
to signal from several inputs—most often, this will be for dynamic processing
purposes (such as outboard equalization, compression/limiting, or noise gating).
You can also use the channel insert sends as post-eq (but pre-fade)
direct
outputs, if you need to route a single monophonic signal to an external device
such as a tape deck.
The MPL 1204 also provides inserts for each of its four buses—appropriately
enough, these are called bus inserts. These allow you to process a group of
signals simultaneously (such as a drum submix being sent to a single track of a
tape recorder) at unity gain. Because they provide a unity gain input and output,
bus inserts can also be used to link multiple MPL 1204s or to bring the output
from another mixer into the MPL 1204 without taking up channel line inputs.
See the “Linking the MPL 1204 With Other Mixers” Application on page 26 in this
manual for more information.
All MPL 1204 insert jacks accept 1/4" TRS plugs, with the ring carrying the send
signal and the tip carrying the return signal; this will normally be connected to a
Y-cord (see the “Connecting The MPL 1204” section on page 12 in this manual
for a wiring diagram). This configuration is sometimes known as an “effects
loop,” since the signal is sent and returned over the same cable.
If nothing is plugged into the channel or bus insert jacks, they have no effect—
but if you connect them to a passive device like a patchbay, you’ll need to
normal (permanently connect) or half-normal (connection is made unless
overriden by a patch cord) the send to the return. Channel insert signals are
returned just before channel Level controls, and Bus insert signals are returned
just before the Bus faders. For this reason, you’ll have to be careful to set the
output of external devices connected this way to unity gain.
12 11 10 9 8 7 6 5 4 123
CHANNEL INSERTS TIP RETURN -RING SEND -SLEEVE GND
BUS INSERTS
UNBALANCED 75Ω +4dBu
MIXER LINKING
4123