The pc-notebook mic input, will be acoupled with an inductor to the 220vac line.
I have no idea what this means, perhaps a transformer? The idea of getting mains voltage anywhere near the sound system of a PC seems like a really bad idea.
Sounds like a BBQ laptop affair
best avoided though I have been tempted myself to try it on a cheap laptop past its use by date.
Might work if the laptop is FULLY isolated from the mains AND anything earth/grounded.
Placed on a rubber mat or wood block etc and RUN ON INTERNAL BATTERY ONLY!
Then you would need to reduce the 220 or 240 volt mains to mic or preferably line input levels with some sort of idiot proof (?!!) resistive network (?) in a FUSED box with 3.5mm breakout lead. What wire goes where on the TRS end I haven't decided on... yet
You could play it safe using step down isolation and audio transformers along the way, but that would defeat the purpose of seeing the raw mains as it is without the transformer influences on the signal.
I am hoping EEVites hit on this ASAP
and correct any stuff I've scratched on
... that -no one should EVER try- at home