Crackling noise with bass boost EQ

Hi everyone, so recently I have decided to turn on bass boost EQ on my 7th gen iPod, and with it, I started to hear crackling noises. That was on the song Doin' it Right by Daft Punk bought through iTunes, initially I thought it was the file, but then I tested with some ALAC songs from Bandcamp and the results were the same.

My IEM is a Truthear Zero RED and on my PC there's no crackling, because of this, I don't think the earphone is the problem. Could it be the 3.5mm jack on the iPod? If anyone could help me out finding the problem I would appreciate it.