I also experience some static and noise when using a standard 3.5mm jack headset (e.g. Apple Earpods or similar).
However, in my case the external mic input is even worse! My Apple Earpods with 3.5mm jack sound totally fine on other laptops. However, on the OLED deck the mic volume is expectionally low and I get a lot of noise in my recordings (high pitched chirping and static). Can anyone try to record his voice with an external mic for a couple seconds and listen to the playback to confirm this?
I experience exactly the same issue on an OLED SD. My external mic volume is very low and it records a lot of static and high pitched chirping when I speak (try to record something and listen to the playback). My mic works perfectly fine on other laptops.