User Manual

English
10
3 Direct monitoring
When recording an audio signal into your audio software, there is often a slight delay before it reaches the
outputs of the software and iRig Pro Quattro I/O. This delay, called latency, is caused by the computer
processing required to convert and record audio. Since this delay can be distracting, iRig Pro Quattro I/O
provides a direct monitoring path from the inputs to the outputs, which is activated by the “direct” switch. When
direct monitoring is enabled, the input signal is mixed with the output signal from your audio software and routed
directly to both the Line and Headphone outputs. This lets you hear the “live” inputs without latency. The direct
monitor switch has no effect on what is being recorded by your software. When using the direct monitoring
feature, make sure any software monitoring option for direct (or “low latency”) monitoring is disabled. Disabling
low latency monitoring prevents “double-monitoring” of input audio signals when using the direct monitoring
feature. When “double-monitoring” occurs, there will be an increase in volume and an undesirable “phasing”
sound. For more details about its monitoring function, refer to the documentation for your audio software.
4 Loopback
With the Loopback function turned on, the audio that is input to the iRig Pro Quattro I/O from your host via USB
is returned back to the host thru inputs 1 and 2. It is possible to control the level of the loopback stream with the
host volume’s control.
Please note that the loopback channels won’t be fed to the safe channels when the interface operates in stereo
or mono mode.
5 Limiter for inputs 1 and 2
The limiter reduces the level when input signals exceed a set level. Set the Limiter switch on, this will affect
inputs 1 and 2 only (either microphone and instrument).