What are the limitations/possibilities of each plug-in?
For the plug-ins running within SaffireControl: One instance of both Compression and either EQ or Amp Modelling can be applied to both analogue inputs 1 and 2 as well as foldback reverb in dual mono or stereo mode. No plug-ins can be applied to the SPDIF In, but if the engineer has an X-Station or a Platinum unit with digital i/o connected then no processing would be required anyway (for example J). If not using the SPDIF In, then inputs 3 and 4 (which are the SPDIF signal when the button below the meters within SaffireControl is active) default to become a second mirrored set of inputs 1 and 2 but without any Compression or EQ/Amp Modelling applied. That way, a backup of the ‘dry’ analogue inputs can be recorded, providing a safety copy that can have processing applied at a later date.