BenJHayes

Thanks for the input -definitely Nvidia causing the issues although I previously had a RTX 2080 and no problems so I'm assuming its the latest drivers. I have disabled MMCSS in the Asio panel and even though Latencymon reports the same issue the DAW is actually running smoothly at very low latency! Does anyone know what MMCSS does and why this has solved the problem?

Ok, so I know what's causing the issue but don't have a fix. I start in safe mode and use driver cleaner to remove my display adapter driver (Nvidia RTX 4070TI). Before Windows installs the Nvidia driver automatically everything is fine with no issues. The moment the Nvidia driver is installed I get the same problem reported -the DirectX Driver Kernel. I have tried reinstalling DirectX but this makes no difference. The problem isn't there in Studio One so is this a Cakewalk bug with 4000 series graphics cards?

Thanks for this -just ran the tool and its telling me that there is a problem with a driver DPC routine running too long or a power management issue. I will investigate but thanks s for providing the link.

Pulling out my hair now! Run the same project on my i9-139000K 64Gb ram and on a Dell Optiplex with 16gb ram - same Focusrite interface and drivers. The monster rig struggles with latency and stuttering where as the poor little office Pc runs it smooth as butter with ultra low latency! I have tried disabling all unnecessary services but still the same result. Could this be a muti core latest gen Intel issue? I've been a Sonar and Cakewalk user for years and never had a single latency issue even in the days of core duo CPU's.

This is what I can see - how do I set the Focusrite as default?

Its not a problem now however if I move the slider and set anything above minimum then the latency and quality is dreadful. I'm assuming that for some reason the driver isn't working correctly. If I even set the buffer size to 128 its unusable but at 16 its fine which is not what should happen. I wonder if the Focusrite drivers or something is corrupted and its actually using something else or another setting? Very weird!

I have had ongoing issues with Bandlab on PC which I don't get in other DAWs or never had with a Sonar. I have to record with a pretty high Latency (512) and mix with even higher rates to avoid pops, crackles and stutters. In fact I cant even really use plugins like ToneX because its too unstable. Accidently I set the Asio buffer size to the minimum and everything is super smooth and even plugins are workable! WTF! Any ideas?