Anyone else notice this?
Its popping loudly too. Its everytime I PLAY, stop, or the driver changes state (audio engine on/off)
Almost unusable. This is with driver 3.080

That sounds totally unusable! No problem here with my UFX in X3, although I'm connected via USB.  Some things that come to mind to check:

• Buffer Size? Do the pops/clicks change at different buffer sizes? I'm running my UFX with a sample rate of 48k. I run 128 samples for tracking and 1024 samples for mixing/mastering with no issues in Win 8.1. This is with the Octamic II connected so I'm tracking up to 12 channels when recording with drums.
• You are current with the FireWire driver. Have you updated the firmware on UFX?
• Have you tried connecting with USB? I tried both and found the USB connection to have less pops/clicks at lower latencies on my machine. Others have had better luck with FireWire, so it's good to try both and see what works best on your machine. The latest USB driver for Windows is 1.036.

The UFX is an amazing interface. Good luck getting it up and running.

Im also connected USB and on driver 1.036 and firmware 353. I use the exact buffer sizes as DPete.  Ive never had a minutes trouble out of this thing since the day I got it.

My UFX works great with USB and X3.  Check your audio settings (e.g. buffers) and make sure you are using ASIO drivers

soundsubs
Anyone else notice this?Its popping loudly too. Its everytime I PLAY, stop, or the driver changes state (audio engine on/off)Almost unusable. This is with driver 3.080

Yes, make sure your driver mode is correct. Does this happen in new projects?

Following up on this thread. I had major issues with pops and clicks when I tried using firewire with my UFX.  Totally unusable.  USB definitely works better, but there are still issues.  For example, if I change the buffer size at all (even increasing it) I get garbled playback until I restart Sonar.  Also, I get some pops and clicks when exporting audio - not on the rendered file, but I hear it as it is mixing down.  Lastly, there is the ongoing issue I know others have noticed as well that there is a lag when clicking the track arm button.  All of this suggests to me that Sonar and the UFX are somehow not communicating properly.  Note I do not have these issues with 8.5 on the same computer.

Try X3D. If you already wrote that you have installed it in your footer, sorry it is not possible for me to see it as the forums admin has decided to hide the footers and our post count it seems.

Dude Ivey
Im also connected USB and on driver 1.036 and firmware 353. I use the exact buffer sizes as DPete.  Ive never had a minutes trouble out of this thing since the day I got it.

I am on driver 1.038 and firmware 352. I am wondering if I need the firmware update for my performance issues. I am seeing the popping on start/stop too in X3.
I am gonna flash the UFX to 353 and see how that works.

CakeAlexS
Try X3D. If you already wrote that you have installed it in your footer, sorry it is not possible for me to see it as the forums admin has decided to hide the footers and our post count it seems.

I am on X3d, and my drivers and firmware are up to date.

Given there appears to be differences between using FW or USB (at least on my system), it would be helpful if those who have experience can say which type of connection they are using.