Apple Logic Pro X - Manual (Page 509)

Chapter 16 Mix a project 509
Route audio via send effects
You use send effects when you want to isolate effect plug-ins from a channel strip’s signal flow, or
when you want to use the same effect on more than one channel strip. By creating a send, you
split the channel strip’s signal. The channel strip’s main signal continues its route to the chosen
output. The other part of the signal is routed down a parallel path, via a bus to an aux channel
strip. You use the Send Level knob to control the amount of signal that is sent via the bus. This is
known as parallel routing. You can route the signal back into the main signal flow at a later point,
or you can output the signal from the aux channel strip.
The primary advantage of this approach over routing via insert effects is efficiency. This method
allows multiple channel strips to be processed by one inserted effect, which saves vast amounts
of processing power (and time) when compared to the alternative of inserting the same effect
directly into multiple channel strips. Another bonus is that you can quickly switch between wet
and dry versions of all channel strips that are sent to an aux channel strip, by simply bypassing
the effect on the aux. Similarly, you can completely change the effects configuration for multiple
sent channel strips by choosing different effects for the aux channel strip.
The following image illustrates a channel strip routed to multiple aux channel strips via sends—
with reverb, chorus, and delay effects assigned to aux channel strips 1, 2, and 3, respectively.
The effect plug-ins
(Reverb, Delay, Pitch
Shifter) are assigned to
aux channel strips 1, 2,
and 3.
On this channel strip, the
plug-ins are routed in parallel,
via sends.
The channel strip’s signal is split and routed to three separate effects, one on each aux channel
strip. These three independent signals are then sent back from the respective aux channel strips
and combined into an output stream from the original channel strip. You can create up to eight
sends on each audio, instrument, or aux channel strip.