Another victim of the "Crackle"!!!!!!!!!!!!

I am out of ideas.  Here are my specs: Win 7 x64, Intel i5 Quad Core 2.67Ghz, 4 GB Ram, M-Audio Delta 192 soundcard with Sonar X1c Producer.I have been reading post after post about crackle issues in Sonar X1c and I can't seem to get mine to go away.  It seems to occur most frequently during playback of bass-heavy sounds.  I brought up an instance of Beatscape and played "Triage-Bass" loop at my normal settings 192Khz, 24 Bit, 64-bit audio engine on and it is crackle city.  I use ASIO Driver Mode and have  increased Playback I/O buffer size and still it crackles.  I lowered the sampling rate to 11.025K and no crackle...clear as a bell.  I steadily increased sampling rate until 48K when the crackle started to come back.  I think my computer is more than capable so I am looking at the Delta soundcard.  Do I need a new soundcard?  Thanks!

Have you also tried adjusting the DMA buffer size in the M-Audio panel?

Here's a stupid question. Are you redlining your tracks or outputs?

Turn off Speedstep, good move.
Check all your drives and turn on Write cache
Run MSconfig and make sure there aren't a bunch of preloaded items that you really don't need.
Update your video drivers to the latest
Update your bios to the latest version
Update your M-Audio drivers to the latest.
Turn off firewire if you are not using it.
Make sure your computer is in performance mode, not power saving for a desktop.
Turn off any service that is design to launch a process at a certain time/date including virus checkers, Adobe updates, Windows updates etc.
If you have more than one controller i.e. midi keyboard, midi mixer etc, disable them all and see if the noise stops. This will lead you ti increase your midi buffers which can be an issue.

Last resort, if you have multiple drives, move the SATA connectors around. Try to get C: drive as drive 0 in drive manager.

I had a similar problem with my previous computer running an older version of Sonar.  Turns out my sound card and my Ethernet card were sharing the same IRQ address.  I suppose I could have tried moving the sound card to another slot in the hope it would have been assigned a different IRQ but instead I just disabled the Ethernet card when using Sonar and the crackling went away.

The fundamental problem won't be with Sonar itself.
I had a M-Audio 192 and then a M-Audio Delta66 and suffered crackles from time to time with both of them.  I assume you've been over to their forums and seen the plethora of posts about this?  I finally ditched M-Audio interfaces and bought a Saffire 14 Pro and have never had a crackle since.
If it's any help I posted some possible moves to address the crackle problem on my web site, although some of them have already been mentioned above:
'Crackles and Sizzle'.
 
John

If you have a compressor on the bass track, slow down the attack rate and see if that helps.

brundlefly


DPC Latency?

http://www.thesycon.de/deu/latency_check.shtml

And what buffer size (in samples) are you trying to run?

It automaticallyu defaults to 256 samples.  I and running latency checker on a project that has many tracks and absolute max is 117us.  Thanks for the link!