please help. strange electrical ticking

Yall I taped my phone under the hood and it sounds totally different. I think its f**king knock. The oil is showing a quart low. I didn't think to check because I changed it recently. I am going to put some fresh 0 20 synth in, change my filter, and run her around the property and see. If it is knock, yes I am embarrassed to not recognize it. In my defense, its my first yoda and she sounds different. Idk what else to say other than I hope it just needs an oil change, and that I am just a quarter deaf idiot! I will update

 

Yall Im embarrassed to tell you what it was. It was KNOCK! sounded totally different from inside the cab. (already loud and crappy sounding from bypassed cat) I was well within my last change so it wasnt the first thing I checked. Lesson learned: always check the oil first, and never let someone take it to walmart. The oil filter was loose and leaking. Changed it myself, new oil filter, and air filter. 0 20 synth. I will go to sleep a much humbler mechanic tonight. Sorry to waste everyone's time, but its still super weird that it would be so much more audible when the accelerator was released. The God of people and yodas knows, but some things arent meant to be understood.