crackling sound on playback

Not too much info here. More would be helpful.
But If you have found that it's Izotope nectar, it could be a clipping issues somewhere on the chain. I would look in that direction first.

I'm using a Tascam US 2x2 as my playback. Buffer size is 64 samples. Everything ran well until two days ago but now it's a problem. I've bypassed Nectar but it's still there. I'm looking at clipping issues along the chain but see none. If I start playback before the actual start it's better.
 
 

scook knows his stuff, I'd definitely try increasing buffers.
 
This may be extreme, but I've found that when weirdness suddenly start happening that something I'm unaware of has been changed in my computer.  On those occasions I do a system restore to see if that solves it.  If it does then you know that the problem isn't in SPLAT or your sound card. 

I get the same thing i think...if i export the project as mp3 or wav its fine its only when listening back in sonar..if i pause and continue to listen sometimes it stops...does that sound familiar george...or ill just restart play sometimes it stops

As asked. if you give us more info about your whole system it will be easier to pinpoint the problem. Put your specs in your signature like most of us do and it saves a whole lot of back and forth. 
 
But your problem is simply your running at too low a buffer setting which is the number one reason you'll get audio issues. Either that or you have background stuff running and using CPU, run Latency Monitor and check. 

Hey George try this....go into the sound icon in control panel...open your device"perfeneces"...select the "supported formats " tab...make sure all boxes are selected...and if that does not clear it up...go back to that sound icon in control and select advanced..move to 44.1 or 48 and test...should get a rinkle out of something I noticed here on my systems.
 
might want to check all sound devices have the complete sets of boxes ticked while in there doing that.
 
if not solving..oh well...troubleshooting 101 begins with a good cup of input...to refresh and reveal the unknowns to the others.
 
Surely you have tried turning off redundant devices....and all power management done...usb power...and other offered up tweaks of turning off services of apps looking for updates and such....right?.
 
Best of hope.
 
cheers.
 
 

Win 10 when updating will change some power settings , restore defaults of win 10 to its own settings...and install applications that run in background ...to my knowledge, of what i say is bloat ware.
 
So here is where the redundancy issue is being forced of devices running behind the scenes of your OS...If you defeat internet Nic..(short for Saint Nickolas it seems baring gifts you asked not for, in terms now?).and it has issues with your audio driver or device....And MS wants that Nic on...Regardless of what you set it for off or on, or made redundant if driver is put in os for....Its tied in and uses it...on or off...as set, if set to disabled.
 
This auto updates feature of OS is where Power management, and other settings is defeated by....MS, because it wants your data...sent out.
 
Try to understand that, and I hope the developers do also try...Because it is causing issues with many folks unaware.
 
That said...try removing the Nic drivers  and turning off things that are no longer needed when you want to use CW in BIOS....might be a stretch of work...to do...but it may help you and your audio driver/device function better, and CW product function better with out the internet or wi fi...As these drivers come more into play to make things of ease to connect to, and gain help or put up to the cloud...or what ever you post to or go to on internet for...You are tied to a door of hazard also...of function...the function of the cpu, the drives on your build...the working ethics..the Protocols of the settings put by user, for usery of licence...To do the multifunctions needed uninterrupted cycles of those parts there in, needed.
 
That way...it should clear the use of...CW and Devices necessary for uninterrupted cycles to complete the Buffer run.
 
But...Not knowing how MS has tied in the trace and track policies, to turn on or off Motherboard features regardless of Bios setting, if drivers are not put in to the setup, might foil some of its workings while getting maximum performance out of the Machine to do the task at hand with devices connect MS cares not about when being used...as Third party devices are not its concern!
 
....MS will put them in a error state once you do install the NIc drivers for internet and connect to the internet....If so doing it...(and there is some evidence it does do)logging error in events and services not able to do that ...cause a unresolvable interruption in cpu cycles....Causing either noise, and or hanging, and or improper usage of device and service hickups....So, to say one thing is solvable....if you do this....MS might do something else to stop the doings...Makes it harder to trouble shoot the problem....As some things work for some people using differing audio solutions....and some things work for others with other setups fine.
 
A crap shoot...try, test...buffers are dependant on...cpu and memory...So,...If this is not cause for alarming some, to try to see into how things work on computers...Some of what the OS does do...and not fall short of knowing how to or causes made by...if so using...or it uses when work is being done.
 
Sloppy engaging of, or forced wait times to resolve Buffers and such...will glitch up that process up.
 
Perhaps this is where much of the interference comes from....
 
I do wonder and fear that forced update policy's doings, is doing here....and other things looking for updates....also.
 
All this unaware multi tasking...using the devices for...while you try to use one thing using same things ....is hard to diag or dial into the causes for...such things.
 
That said....Time to try Buffers...But as it is said also...it may not solve.
 
If such things are going on...it will be time to solve that ....by trying all things known to help...and if not helping...new things thought that might.
 
 
Best of the Day
 
Sir Les