According to the manual, that should work.
So you would run one DAC8PRO in Pure USB mode, connect the AES/EBU out to the second DAC8, and run that one in USB / AES mode.
Hello Zooqu1ko,
I have not yet heard from Pavel on this issue.
I briefly tested, however, the "sync" connection by AES/EBU digital out of my DAC8PRO into second DAC, not DAC8PRO but ONKYO DAC-1000(S) which I have and capable of AES/EBU digital input;
Before my actual trial with DAC-1000(S), I sent my inquiry to ONKYO's customer support center asking; "If I would connect DAC8PRO's AES/EBU digital out (CH1+CH2) to DAC-1000(S)'s AES/EBU input, DAC-1000(S) would be fully
in sync with DAC8PRO for the DA processing, right?".
An ONKYO engineer quickly responded by email that "If DAC8PRO's AES/EBU digital out is fully compatible with the
IEC90958 of AES3 Standard issued in 1985, then DAC-1000(S) would be automatically fully
in sync with DAC8PRO, without using DAC-1000(S)'s internal clock."
As DAC8PRO is also for pro use, its AES/EBU digital out (CH1+CH2) should be fully compatible with the
IEC90958 of AES3 Standard, and as described in the Owner's Manual of DAC8PRO, the second DAC would be automatically
in sync by this AES/EBU connection, I believe.
Then I actually tested by connecting DAC8PRO's AES/EBU digital out (CH1+CH2) into ONKYO DAC-1000(S), and listened to both sound,
i.e. sound from DAC8PRO's XLR analog out (CH1 & CH2), and sound of ONKYO DAC-1000(S)'s XLR analog out (L & R), for a continuous period of overnight (15 hours). As the result, I found
no asynchronization nor drift of sync between the two DACs; DAC-1000(S) has been fully
in sync with DAC8PRO.
We should note here that DAC8PRO's AES/EBU digital out (CH1+CH2) is the through digital out of CH1+CH2 which is
not under the control of DAC8PRO's volume or gain controller. Of course, even in this setting, we can use software crossover on PC for master volume and gain controller once we would fix the volume balance in down stream.
In
my project, this
"in sync connection" to DAC-1000(S) gives another option for connection to L & R sub-woofers YAMAHA YST-SW1000 by RCA unbalanced input, while DAC8PRO's 8-channel XLR OUT are all working for stereo 4-way drive of my woofers, squawkers, tweeters and super tweeters. I also described this setting in detail at
here in my thread.