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MacOS Sierra Problem Creating Aggregate Sound Devices

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I have a couple Bose speakers for which I'd like to create an aggregate sound device.    I've attempted this procedure in the past, with other speakers and mixed results.

 

In this case, I have an older-model Bose Wave Radio with the USB dongle and a new Bose Revolve+ Soundlink cylinder.     They are both within 20ft proximity of my MacPro, so there aren't signal issues involved.

 

I've attempted using both the dongle and the Resolve+ as the clocking device, altering drift control appropriately -- most times, I just get one speaker working.   At one point, I was getting sound delays where I'd hear music in one speaker, then the same beat on the next a skip/step later.  That was fun.

 

From my experience using this MIDI setup, I'm beginning to think it's buggy.  However, it may be I just can't accomplish what I need to do here, though I cannot see why as they work fine individually and this is just an API abstraction underneath (presumably).

 

I've looked online, followed directions, but I still can't get this working -- I wonder if anyone here has encountered this problem, or may have some useful pointers.

 

 

Thanks!

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