help me out with the weird Sound Lag, Stuttering or Doubled Sound issues?

Without more details, we can't possibly know what your problem is. My first suggestion is that your CPU is probably underpowered.

Without any info on which kinda speakers/soundcard and computer specs youre using its impossible to help you.
Also what audio settings are you using?

Wartapes is in my opinion the best audio setting, but i think its also one of the more taxing options.
Theres also a setting in the "Audio" menu (cant remember the exact name) which sits under the "War tapes" option - the name of it contains "Enhanced", that option should only be active if you dont have surround sound speakers or headphones.

To correct audio lag
press ~, (beside letter 1 on keyboard)type in
renderdevice.forcerenderaheadlimit 1
renderdevice.triplebufferingenable 0