Optional Readonlymute?: booleanWhether THIS destination is muted independently of the bus master — absent ⇒ un-muted.
Optional ReadonlytrimDb?: numberPer-destination trim (dB) applied POST bus-master, at the fan point, to THIS destination alone — absent ⇒ unity (0 dB). Negative pulls the feed down (the −10 dB the RME had externally, now on the console); positive is allowed but a physical route rarely needs boost.
One output destination: the leg-aware sink endpoint (OutputEndpoint — role→port) plus an optional per-destination
trimDb/muteand a PER-SIDE delay (OutputLegDelayMs —delayMsL/delayMsR/delayMsC, #845). Every optional field absent ⇒ unity / un-muted / no delay. The operator delays the EARLY side to match the late one (task #151: the REAC box monitor plays ~50 ms before the RME feed; #845: the near box against the far one). The FOLD is not among them: both roles on one port IS the fold (isFoldOutputEndpoint), at MONO_FOLD_COEF, and there is no number to carry. A stereo{L, R}carries one shared trim; a mono leg carries its own.