For many years since APO v.1.2 I have been experiencing a repeating
sound popping / crackling every time I wake my windows PC
after I had it Sleeping. This issue does not seem to happen with
APO Uninstalled.
In order to help diagnostics, are there any log files or such I can
provide ?
Although the developer isn't that active you can provide a trace log. But I doubt if something useful is popping up but you never know. We can take a look at it here.