
Chapter C Connecting Logic to a Mixer 101
Note: Adjustment of the Audio Input Object levels only affects the incoming audio
stream when Logic is monitoring audio. When recording you need to adjust the input
levels at the source. In other words, you need to increase or decrease the level of the
synthesizers connected to inputs 3/4 and 5/6 if you wish to record their output as
audio into Logic. This type of level adjustment doesn’t need to take place on the DAT
machine connected to the digital input. In the case of microphone and guitar, you may
need to insert a compressor into the signal path—either externally, or into the top
Insert slot of Audio Input Objects 1 and 2, to ensure that an appropriate audio level is
captured.
Mixing Desk Without Sub Groups
If your analog mixing desk does not offer sub groups, proceed as follows:
Connect the audio hardware outputs to the first of your desk’s Line or Tape inputs. Use
as many channels as your audio hardware requires. Use the remaining channels for
your other sound sources, effect processors, and microphones.
Note: If you find yourself short on channels, you can connect Logic’s outputs to your
desk’s Aux Returns (or “Effect Returns”). This really cannot be avoided with smaller
mixers, but it is not much of a penalty, as Logic offers extensive EQ and processing
power, anyway.
Your mixing desk is likely to offer at least two Aux Sends (not to be confused with Aux
Returns)—they should be wired “pre-fader”, or should be switched to this mode, via a
dedicated button. “Pre-fader” means that the signal is accessible before it enters the
channel fader (volume slider). This means that the pre-fader Aux Send will output the
channel’s signal, even if its fader is pulled all the way down. This kind of output is
usually referred to as a monitor output, and may actually be labeled as such.
Each channel has two knobs that are used to create a mix, which is sent to the desk’s
corresponding auxiliary (or monitor) output. Connect these two outputs to the two
inputs of the audio hardware. As an example, if the two pre-fader Aux Sends are
labelled “Aux 3” and “Aux 4”, you would connect a cable from the desk’s “Aux 3 Output”
to the first audio hardware input, and another from Aux 4, to the second input.
Once set up in this way, you can control Logic’s inputs with the Aux Send controls (and
their master sends). Slide the master fader all the way down for each channel that you
wish to record—this will allow you to hear the recording after the “tape head”. To
provide you with a “real-world” example, if the tracks that are to be recorded are routed
to Logic’s 1 & 2 outputs, you would listen to channels 1 & 2 on your desk instead. This
allows you to instantly spot any distortion introduced by an overload of Logic’s inputs.
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