Dave,
... But simply put : your buffer is too short. So, extend the buffer so much that it will never need a 2nd round and the thing won't happen for 100% sure. So, a first thing to do wrong is your mentioned "1024 sample rate" of which I suppose you mean Device Buffer Size" which won't fit in any Q1 (of 30) unless you also have Q1Factor higher than 1. So, I *know* that with a Device Buffer Size of 4096 Q1 must be at 14 to be safe (and not ~3 which would be a comparing setting to your Device Buffer Size of 1024).
So, whether you like the sound of a higher Q1 or not, when you set your Q1 to 14 and Q1Factor to 4 and leave all further the same, you won't have any cracks at the end. Now, theoretically your "crack" comprises of four passes (three I think) of wrongly connected buffer data.

Hope this helps. It should ...
Peter

Hahaha But yes,,, our stereos really are about being phase sure to get the best sound stage/SQ out of them... the closer XXHE gets to doing that the better it sounds.  I need to sleep, but maybe soon I'll list the settings I'm using to get there... but at this time they involve Special, +1 PA intensity, minimize,,,, many other settings, and not  touching anything (vol control or anything), shutting off the amps before the last song stops.... to listen to the best and not hurt the system.. later Peter, but it is quite something if you're willing to jump through the hoops.  Thanks,,, and ah
not recommended to anyone but the mentally insane.

100% !
If there's no DC at the output of the amps of course ...

The quick answer : Connect your subs through the outputs of the amps. When you have the choice (LS cable inputs on the subs) that is better anyway IMO.

I haven't the time to read everything here.  But Peter, you know my XXHE Windows HD has never been online.  I activated by calling MS over the phone (when you choose to activate they give you this Offline Activation option... giving them my number from the valid Win7 pro, and they then gave me a long ass number to type in, and I'm activated.  I only run XXHE HDD in minimzed mode and have never booted back to normal.
but,
When i start windows I don't see this message... but after playing XXHE for awhile, I see a message like, "this copy of windows is not genuine" even though I did an offline activation. I just laugh and figure it's you messing around with windows and MS doesn't like that.  Doesn't affect SQ and when I start up the next day it's gone until I play XXHE again... which is the only thing that HDD does.

Dave ...

No. This way you won't be Activated. All you did was entering your Key, and that now waits for Activation - which will happen when you go on-line the first time *and* you entered somehwhere that this Activation should automatically happen when you go on-line. Normally you enter this during the install of the OS - and btw once you did I don't think this "checkbox" can ever be removed again (Google couldn't tell me about it). Hey, it is already hard enough to find out how to re-enter a once entered Key (but that sure can be done).

So, in your case too, Activation will only happen when you go on-line, and there's a fair chance that you too will loose your OS when that happens. Over 30 days ...

What I didn't know is that the "not genuine" text only appears after playing with XXHE. Maybe it is Wallpaper related ?
(note though that the messages appearing in that area are not "burned" into the Wallpaper or background otherwise, but maybe the change of Wallpaper triggers the text)

Peter

Hello Peter
Thougt I had to dare using the PA now, with the version 3, but I get the same crack/beplop sound at end, and while stopping playback as the others did before. did I misunderstand anything? thought it was safe now. tried with the fade out step as well.

Regards Arnt