Setting To Reduce Total Round Trip Latency

Sorry I am reposting this, i didn't realize I couldn't delete my own post on the forum and was trying to figure out how to properly attach a picture and got move to coffee house before I could actually fix it:
 
Please don't banish me if this is not the right location to post this type of question, but I am wondering if any one feels that the round trip latency that my system is a little odd and if it is I am hoping that some of the gurus here on the forum might be able to point be towards what I can look at to help to improve it. First off to give a little bit of back ground I am using the Roland Octoacapture (sometime two of them) as my audio interface and I have the most current drivers (1.52) installed.  As for other hardware I am running a i7-3770 on a Asus P8Z77-V Pro motherboard which is loaded with 32 gb of Corsair Vengeance DDR3 1600 MHZ.
 
Currently my setting in the preferences menus are as follows:

 

 

 
It seems very odd to me that the round trip latency is so high.  It makes it nearly impossible to use the input echo to monitor while recording.  Any insight that could be offered would be great.
Thanks!

Yeah, I don't understand why your total roundtrip latency isn't down in the 9-11 millisecond range.
 
I'll do some digging, but I will likely have to grab some sleep first - I WILL look into this after some snoozies....
 
Bob Bone
 

Download the free CEntrance ASIO Latency Tester, and measure the actual round-trip latency. I'm guessing something is causing the driver to misreport, and the actual latency is not that high. If that's the case, you'll at least want to enter an appropriate Manual Offset (CEtrance Measured RTL - SONAR-Reported RTL) to prevent SONAR overcompensating record latency until you get the driver issue figured out.
 
Also, it's unlikely to make any difference to this issue, but unless you actually want other programs to be able to use the interface while SONAR is running, I would recommend you disable Shares Drivers With Other Programs

Here are the driver settings for the octacapture.  As you can see I am all ready at 128 samples.  
 

 
 

What does "Use ASIO direct monitor" do?

Can't break anything by trying it....
 
 
 
 
 
 
 
(but maybe wear some safety glasses just in case..)

In the driver settings window just below sample rate and clock there is "Audio buffer size".
This is separate from the ASIO buffer size and is set mid way...   try lowering that.

Octacapture is usb, right?
I would try other usb ports.
May be something related to something else on the same usb root hub on MB.
 
And if using external hub - go to computer ports directly with interface.

HighestOlive
I am starting to wonder if this is a USB Hub/port issue, but am having a hard time figuring out how I can identify what hub or controller is being used.

In device manager, look for usb root hubs.
On those you can see on power tab what is connected on those.
Which device and how much current it's expecting to get.
 
External hub register also as root hub, if I remember correct - so then you've got two levels of hardware in between.
 
Just tapping into computer directly will make improvements - bypassing external hub.
 
But to be systematic, use device manager and rule out where to put it.
While there you can also see to that system does not allow power to shut down on those ports.

Sonar does not support ASIO Direct Monitoring. (ADM)

I have never had a hub between the Octocapture and the computer.  It as always been directly connected.  Maybe "currently" was a poor choice of wording.

HighestOlive
I have never had a hub between the Octocapture and the computer.  It as always been directly connected.  Maybe "currently" was a poor choice of wording.

That's good.

I think the VS expand setting is used in connection with the VS series of Roland Audio Devices so yes this should be set off.

That is correct.  I have two octo-capture,so that should be on.  Some time I don't turn both on.  It depends on how many inputs i need.

HighestOlive
Looks like real latency.

 
Sort of. SONAR's showing 73 samples more round-trip latency, which is considerable, and the driver usually under-reports. Typically, the measured value will be 20-40 samples greater than reported by the driver to SONAR.
 

Having just sonar open (no project) I see this roundtrip latency reported in the driver setting.  If I open a proejct it goes to the value seen above.

 
I don't understand this. You're saying CEntrance reports 850 samples when SONAR is open with no project (i.e. audio engine not engaged), and 777 when a project is open? That's a little weird; it's very close to what you'd expect for the difference between 44.1kHz and 48kHz. In any case, I suggest you check again with SONAR shut down.
 
Like others, my first thought was that something is going on with your USB port drivers, but I don't think SONAR detects latency added by USB. It seems to me whatever is going on is all happening in the Octacapture hardware/firmware/drivers. Some re-installation might be in order, but if CEntrance is measuring such a high latency at a buffer of 128 samples, I would take that to Roland support as it's not a SONAR-specific issue.
 
 
 
 

It's easy to see if reported is correct or not.
 
Just make a analog loopback on interface - and record metronome on that track.
If they line up reported is correct.
 
Then that is estabilished you can go on and see what really makes it that high.
I would surely turn off that expand thingy and see what happends.
 
Are the any usb dongles - iLok or Syncrosoft?
Remove those while doing tests and see if different with and without.