The fact your only hearing sound from the center channel using the 5.1/7.1 analog input of the Bryston SP3 is leading me to thinking the Esoteric unit is the offender here. As you probably know, there are several formats available of standard SACD's (3 to be exact) With my DV50S, you can change the readable format from Stereo Audio, 5.1 Channel audio and for standard SACD's. (reading right from the manual). This function cannot be performed from the remote, but; the unit itself.
Short of telling the SA-60 which section to read for playback, sound from only the center is .......pointing to an issue with the SA-60 if all of the setup settings are correct.
Short of telling the SA-60 which section to read for playback, sound from only the center is .......pointing to an issue with the SA-60 if all of the setup settings are correct.