I've done extensive testing and have found the new AVB Ultralie firmware 1.2.9 which came out June 2017 causes permanently embedded crackles in a wav file, even though there are no crackles heard during recording. Anyone who has this firmware I'd suggest to pay close attention to see if it happens. It always happens on the first audio recording when you open a CWP file. After that every recording will have the same crackles until you close that file and reopen it. Then it'll be fine.
 
I have another post where I documented all of this and the long process it took me to finally find the culprit.   http://forum.cakewalk.com...670740-p2.aspx#3681525
 
The purpose of this post to to alert others and to let me know if you have the same problem, so we can get it fixed. If you're not having the problem, I certainly want to know also in case it's system dependent. This will help MOTU in fixing it.
 
Here's a test you can do to find out if your system is afflicted.
 
Open a CWP file. Record 1 sec or so of audio and listen to it. Then close the CWP and reopen it. Keep doing the same thing at least 25x. In my testing the bad crackles happened sometimes on the very first recording, other times on #8 or as high as #22. If you get crackles go ahead and record one or more just to be sure it crackles every time

There is an older thread on the gearslutz forum.  In that thread, "loopy" notes he had similar problems and how he eventually solved it.  May or may not apply to your specific problem, but look at it anyway.
 
https://www.gearslutz.com...10-problems-works.html

fireberd
There is an older thread on the gearslutz forum.  In that thread, "loopy" notes he had similar problems and how he eventually solved it.  May or may not apply to your specific problem, but look at it anyway.
 
https://www.gearslutz.com...10-problems-works.html

 
Were you referring to this statement by Loopy?
-=-=-=-=-=-=-=-=
there are some other core parking settings and running the program "Park Control" showed that while my cores had parking disabled, I did have something called "Free Scaling DC" at 5 percent....
Disabled it and BINGO.
=-=-=-=-=-=-=-=-=-=
I've never heard of core parking  and wonder if any one using Plat has tried this
.

I've seen "core parking" (disabling that) many times on recording forums.  Its something to consider.

Free Scaling DC only applies to machines running on batteries (DC) which generally means laptops.  Only a factor if you are using a laptop.  The utility app pointed to by that thread is pretty nice though and if you are on a laptop turning Free Scaling DC off would be very smart (though it will make the laptop consume more battery power).

fireberd
I've seen "core parking" (disabling that) many times on recording forums.  Its something to consider.

I read some about it and it seems to mention power consuming and heat. These are non-issues for me with my desktop DAW. Even though I've solved my serious embedded crackles in wav files, I've always have gotten the fleeting pop, glitch, crackle on playback, mostly with a light load of FX and tracks.
 
If disabling core parking would make that better. I can try it. I have my power management set for high performance along with the usual optimization techniques recommended by DAW users. I've never seen core parking ever mentioned in these optimizations. I'm wondering if I'm really not a good candidate for that using Platinum. All I care about is  a good stable reliable predictable DAW. Jim Roseberry who built my PC has never mentioned it. 

Pops, clicks, stuttering, etc has been an issue for many, dating back to Windows 7.  It happens on the basic windows PC sound.  There are many possibilities and there is no "one fix" for it, each case has to be handled individually.  Sound (devices) are always assigned a shared IRQ (Interrupt) with another device, and Windows assigns the lower priority to sound.  Thus the shared higher priority device, for example, can cause sound issues.  Wi-Fi is a known cause of sound problems.  
 
As you have a custom built DAW PC, it was probably set up by Jim for best DAW performance before you got it and no other "tweaking" was needed.   I built my own DAW PC and the only "tweaking" I've done is set the power plan for High Performance and the PC is set to never "sleep".  I also do not use the Win 10 fast startup.   

No one else, apparently, on this forum has the problem.  
Suggest you post on the www.gearslutz.com forum, a general recording forum.  May get an answer or more help there.

fireberd
No one else, apparently, on this forum has the problem.  
Suggest you post on the www.gearslutz.com forum, a general recording forum.  May get an answer or more help there.

I have the same problem. There are a few others who have reported the same thing too.
 

gmp
I've done extensive testing and have found the new AVB Ultralie firmware 1.2.9 which came out June 2017 causes permanently embedded crackles in a wav file, even though there are no crackles heard during recording. Anyone who has this firmware I'd suggest to pay close attention to see if it happens. It always happens on the first audio recording when you open a CWP file. After that every recording will have the same crackles until you close that file and reopen it. Then it'll be fine.

I have another post where I documented all of this and the long process it took me to finally find the culprit.   http://forum.cakewalk.com...670740-p2.aspx#3681525

The purpose of this post to to alert others and to let me know if you have the same problem, so we can get it fixed. If you're not having the problem, I certainly want to know also in case it's system dependent. This will help MOTU in fixing it.

Here's a test you can do to find out if your system is afflicted.

Open a CWP file. Record 1 sec or so of audio and listen to it. Then close the CWP and reopen it. Keep doing the same thing at least 25x. In my testing the bad crackles happened sometimes on the very first recording, other times on #8 or as high as #22. If you get crackles go ahead and record one or more just to be sure it crackles every time

Well I can now state without any doubt I agree with Gerry. I was experiencing dropouts, crackles, no audio etc with the latest firmware. This happened on a fairly regular basis with the crackles occurring very often. Adjusting settings didn't make any difference.
 
I eventually rolled back to an earlier firmware version and have been recording, mixing and playing back all day with not a single dropout, crackle or complete loss of audio.
 
I'll be staying with this setup until MOTU either fixes it or at least acknowledges that there is a problem.
 
Thanks for the help, Gerry!
 
Cheers
 
Peter.