I just purchased an Apollo 8 TB for Windows and have it installed.  Sonar did a great job finding the interface and when I played a project recorded in Sonar back I hear all the tracks.  Cool.  However I am getting an annoying delay that the UAD manual says is an input latency.  I am supposed to either turn off something in the UAD console or in Sonar.  If someone is using an Apollo 8 with Sonar (I am using Platinum) I would love to know what your Sonar setting are and how to rid of this delay.
 
Any help is really appreciated!

I'd wait for a PC (Desktop) with a Thunderbolt 3 port....they should be available shortly.
Then you could use the Apollo to it's full potential...
 
Personally probably wait for an RME Thunderbolt 3 / Windows version....will be half the price and same quality somewhat (or better I don't know)...
Just not sure if an Apollo has Midi ports..

todd_bates
 I am supposed to either turn off something in the UAD console or in Sonar.  If someone is using an Apollo 8 with Sonar (I am using Platinum) I would love to know what your Sonar setting are and how to rid of this delay.

See Post #8 in my Pro Review of Apollo Twin USB. 

My new PC does have TB capability.  The MB has a USB 3.1C port and the TB drivers so it worked fine as far as installation goes.  Apollo 8 does not have MIDI ports but that was never a concern for me as I haven't done MIDI work in years.
 
 

Mr.  Anderton, you have saved the day, sir!  I am using my TB capability via USB3 and when I made the changes you suggested I was able to get to a round trip latency of:  
Input:    3.5 msec, 156 samples
Output:  1.9 msec, 84 samples
Total Roundtrip:  5.4 msec, 240 samples
This is at a Sampling Rate of 44100
 
When I shut down, restarted both the Apollo Console and Sonar I listened to a project and it was like night and day!!!
 
I decided to follow your lead and change the sampling rate to 96000 just to see what would happen.
Input:    1.6 msec, 156 samples
Output:  0.9 msec, 84 samples
Total Roundtrip:  2.5 msec, 240 samples
 
I can't tell you how much I appreciate your post and advice.
 
Given what I've seen, and since 44100 sample rate seemed to solve the issue from a practical sense, do you recommend I stay at 44100 or keep it at 96000?
 
 
 

todd_bates
I was able to get to a round trip latency of:  
Input:    3.5 msec, 156 samples
Output:  1.9 msec, 84 samples
Total Roundtrip:  5.4 msec, 240 samples
This is at a Sampling Rate of 44100
 
I decided to follow your lead and change the sampling rate to 96000 just to see what would happen.
Input:    1.6 msec, 156 samples
Output:  0.9 msec, 84 samples
Total Roundtrip:  2.5 msec, 240 samples

 
Hey Todd, so you are using the latest Apollo generation "Blackfaces" with Win 10/TB3 via the new universal USB 3.1 connectors? What is the lowest available audio buffer size available @ 44.1K? It appears from those latency specs the Apollo is using PCIe audio drivers via TB. Those RT latency specs look great and are in line with Apollo TB RT specs found on the Mac. 
 
I currently have an Apollo Twin Duo/Satellite USB combo. I get a RT latency of 8.4 msec @ 44.1k using a 64 sample buffer size (lowest available) which works absolutely fine for me. I do most of my recording via the Apollo Console using UAD plug-ins in realtime on the front end and avoid the added audio buffers and round trip latencies altogether.
 
Cheers,
 
Billy Buck
 

Hi Billy,
So I had to actually build a new PC in order to use the Apollo 8 (duo) using Thunderbolt. I had t make sure the MB had the USB 3.1c port, even used a board that UAD had tested and certified. I was worried to death about being an early ish adopter of TB via Windows. I was a little concerned newer pcie 4 slots with my existing UAD2 quad card, but everything seems to be working pretty nicely now. It is still early but I am cautiously optimistic. I am sure I will be a frequent visitor of the forum for a bit.

:)

Thanks to everyone for the info and encouragement!

todd_bates
 I am sure I will be a frequent visitor of the forum for a bit.

...and I hope a contributor too, so you can tell us what life is like on the "bleeding edge."

Well, that didn't take long.  lol
While the latency issues are resolved now I am getting drop outs.  A lot of them.  I am experimenting with all sorts of different caching settings and buffer sizes to see if I can find something to indicate a pattern or root cause.  If I find anything I will be happy to share.  If anyone else finds anything I would love to hear from you.

hey Todd, helped me to uncheck 'enable read and write caching'
find it here:  Preferences, Audio, Sync and Caching
 
Also I have some projects that somehow only will work if I save them to my desktop.
It sounds strange I know....tried to save those project under new names, in new folders elsewhere, with copying the audio into the new location....without succes...
And then when I make changes to such a project, it will give me audio engine dropouts.
I then save the file, close and reopen and it's fine.
 
Also launching Sonar from a taskbar icon, makes it open faster on my Windows 7 machine.