Solid State Logic SSL 18 User Manual page 32

Determines the compensation level for Mono summed busses, adjustable between -3.0dB & -6.0dB
I/O MODE
You can put SSL 12 into I/O Mode by engaging the tickbox in the upper-left corner of the SSL 18 Mixer.
I/O Mode bypasses the SSL 18 Mixer's routing matrix and fixes the routing as shown in the table below.
Note that you still have the ability to choose the Input Source for Inputs 9-10 (choosing between Loopback, S/PDIF or Talkback).
You can also freely choose which output pair Headphones A and B are fed from by clicking on the desired circle.
I/O Mode can be used for different purposes:
• To simplify the operation of the unit when you do not need the full flexibility that the SSL 18 Mixer offers.
• It allows SSL 18's outputs to operate at 176.4 or 192 kHz, instead of downsampling them.
• When I/O Mode is not engaged (SSL 18 Mixer is active) and you are operating at sample rates of 176.4 or 192 kHz, SSL 18's
outputs are automatically downsampled to 88.2 or 96 kHz in order to preserve the full mixing capability of the mixer. Other audio
interfaces typically limit mixer capability in the same scenario. So if you want end-to-end 176.4 or 192 kHz performance, then I/O
Mode is a useful option.
PROFILE
The user can Save and Load customised profiles for the SSL 18 Mixer. To Save a Profile, simply press SAVE AS and name your new
Profile, which will be saved in the SSL 18 folder for easy recall.
To load an existing profile, press the LOAD button, which will then open a window to all the saved profiles, and can be selected by
pressing 'Open'.
The default storage location for both Mac & Windows OS's is shown below, although they can be saved & stored from any location.