I thought I was on to something when I noticed that the unit and plugin have four outputs (switchable, a pair at a time, for the plugin), and the pairs are arranged oddly; but the more I read, the less I'm sure this could be a factor.
From the manual:
Inputs & Outputs
The Lexicon 224 hardware has two inputs (see Mono/Stereo below), and four discrete outputs, labeled as A, B, C, and D. Outputs A and C were designed to be used as the main stereo left/right outputs. The other two outputs, B and D, are implemented in some programs for use as quadraphonic reverb.The UAD Lexicon 224 fully models the individual sonics of all four outputs when available in the program algorithm. The alternate B and D outputs are available via the Rear Outs control.
Mono/Stereo Operation
The Lexicon 224 hardware has dual channel inputs (left and right) and is a true stereo processor. Like the hardware, when the Lexicon 224 plug-in is used in a stereo-in/stereo out configuration, the left and right channel signals are both processed.When used in a mono-in/stereo out configuration, the mono input is sent to both channels of the stereo processor. When configured as mono-in/mono-out (MIMO), output A is used exclusively except in programs 2, 4, and 9, where outputs A and C are summed into one monophonic signal. This implementation is recommended in the original hardware manual. If Rear Outs is enabled in MIMO mode, outputs B and D are used instead of A and C. See MIMO Program Outputs for a list of outputs used with each program in this configuration.
Rear Outs
The Rear Outs control is available to select the alternate pair when the algorithm has alternate sonics at outputs B and D. See Inputs & Outputs for an overview of the hardware implementation.
Rear Outs Notes
>The left/right outputs of the plug-in always reflect hardware outputs A and C respectively when Rear Outsisinactive, and outputs B and D respectively when Rear Outs is active.
>Outputs A and C are recommended for stereo use (the rear outs are generally not used in typical applications).
>Outputs A and C are identical to D and B respectively in the following programs: P2 Vocal Plate A, P5 Percussion Plate A, P8 Constant Density Plate A, and P9 Chorus A. Consequently, the Rear Outs control effectively swaps the left/rightout-puts in these programs.
My assumption is that these A/C and B/D pairs are routed to the VST plug's 1/2 outs and, therefore, to the host's 1/2 patch connection (could it be any other way?), regardless of host. But if this is true, I have to wonder why UA is going to the trouble of explaining that A/C and B/D stuff at all. It seems irrelevant in the context of a simple stereo out of the plugin, even though it's swichable between two stereo pairs.
Then there's the section on mono in/mono out (MIMO) functionality:
MIMO Program Outputs
When Lexicon 224 is used in a mono-in/mono-out (MIMO) configuration, the hardware outputs that are used for the plug-in are listed in the table below. These software assignments are per the guidelines in the original hardware manual and cannot be modified.
ProgramOutput(s)ProgramOutput(s)
There appears to be no way to configure this as MIMO. Perhaps that's a function that's up to the host? I wouldn't think so, but the manual doesn't say. And, to be honest, I'm not understanding what they mean about the varioius output configs in MIMO mode.
Interesting discovery, although maybe not that surprising: pushing the aux send pan control to the left (on either the sending channel or the master send) seems to work much better to give me a balanced reverb sound in the wet stereo field.
Insights, anyone?
Sure would like it if someone could confirm this with their own UA 224 plug.
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