Jim Roseberry
Hi Billy,
 
Got one on order.
What's the minimum round-trip latency... and smallest ASIO buffer size?

Hi Jim,
          The smallest buffer size is 64 samples ASIO. Both Centrance & RTL Utility confirmed 6.08ms RTL (64 samples @ 44k). But both REAPER 5 & SPlat report 8.3ms- to 8.4ms RTL respectively. So it is probably something in-between 
 
The Twin USB is sensitive to having a finely tuned DAW for the needs of real time audio processing. Fixing DPC spikes, needing to update or even downgrade certain USB 3.0 Host Controllers to a different driver version or even a BIOS update have all been reported over the last couple of days at the UAD forum as having fixed seemingly inretractable crackling issues during playback. I keep my DAW maintained have it fairly tweaked and fine tuned for real time DAW use, so I was not surprised I was able to connect and start using my Apollo Twin USB right out of the box.
 
Cheers,
 
Billy Buck

So they are supporting Windows 10 after all?

TerraSin
So they are supporting Windows 10 after all?

Well not quite officially, but UA's website does emphatically state:
 
Apollo Twin USB Windows System Compatibility
Important Windows Compatibility Notes

Windows 10 has not yet been fully tested by Universal Audio. However, complete Apollo Twin USB compatibility testing with Windows 10 is currently underway, and initial tests have revealed no known compatibility issues. This statement applies to Apollo Twin USB software only.


Win 10 is becoming more popular every day, UA has no choice but to support it.

Here is a video from Winter NAMM 2016 with UA rep Gannon Kashiva confirming UA's commitment to the Win platform (about the 2:48). I have to admit, that affable and cute as a button "Choie" from Westlake Pro Audio stole the show for me . 
 
https://www.youtube.com/watch?v=dy_lRyxfV6E
 
 

Billy Buck

TerraSin
So they are supporting Windows 10 after all?

Well not quite officially, but UA's website does emphatically state:
 
Apollo Twin USB Windows System Compatibility
Important Windows Compatibility Notes

Windows 10 has not yet been fully tested by Universal Audio. However, complete Apollo Twin USB compatibility testing with Windows 10 is currently underway, and initial tests have revealed no known compatibility issues. This statement applies to Apollo Twin USB software only.


Win 10 is becoming more popular every day, UA has no choice but to support it.

Forcing does not equal popular.
My legacy hardware will use W7 drivers in Windows.  What did these other developers do that wont make things work in W10.  It's not like this OS just snuck up on everyone.    I
 

UA is just covering their back side.  
Until they've collected the experience from a larger pool of Win10 users, they don't want to say emphatically that it's 100% compatible with Win10.
 
It's rare to find a Win7/8 driver that just doesn't work with Win10.
If there's an issue... it's typically the installer itself (run it in Win7/8 compatibility mode).

The Roland drivers for the V-Studio don't work in 10. Hence, why I'm looking to get something new. I can't even use the damn thing without the audio driver crashing now.

So now that a few of you guys are using this on Win10 and seemingly having good results, it's back on my list as a possible replacement. Anything more to add since you've been using it?