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[AGAWA]

Hi,
I'm thinking about using 3 stereo DACs on MAC, aggregate the three and use in MCH setup.
Do I need to connect them to 3 different USB ports? Or use a hub?, one port in MAC and three out of the hub to DACs?
Your experiences please.

[Wheaten]

I don't think JRiver supports 3 different audio channels on USB.
And no clue why you would want this, 3 DAC's for the same Stereo output.

If you vote for a hub, do some research as USB hubs have a very negative impact on Audio quality.
Normally i am not concerned when speaking in the digital domain (just bits), but USB is a strange one.
There is no control or correction on USB transport for digital audio.
Whatever happens between source and receiver will be received as is. (including EMC spark, PSU ripples,.....)

[AGAWA]

I'm seeking advice on - how to setup 3  x 2ch DACs , aggregated in Mac OS so they constitute 6ch MCH DAC.
People do this and it works in JRiver.
Anyone with such experience please comment.
I know Kal Rubinson does  it.
Do I need 3 separate USB-A ports on Mac or just one port with  USB hub attached (hub with 3 ports) ( Kal R mentions plain Belkin USB hub).
If on hub - how will I synchronise all 3 DACs?
Mac OS has ability to set different use of clock and sync.

[AGAWA]

found rather extensive discussion here:
https://yabb.jriver.com/interact/index.php/topic,128850.0/prev_next,next.html#new

[iansr]

AGAWA;  I’m very interested in this subject as well.  I want to implement 6 or 8 channels in JRive’ s  convolver using filters derived from AudioLense and then feed multiple DACs using the Mac’s Aggregate Device facility.  Ideally I think each DAC would be plugged into a USB port on the Mac rather than use a hub.

[iansr]

found rather extensive discussion here:
https://yabb.jriver.com/interact/index.php/topic,128850.0/prev_next,next.html#new

Wrong link ??