48V phantom power XLR Mic into PC

[jaocaetano]

Hi there everybody!
I see there are lots of experts here, perhaps I can get my questions answered.


I have a condenser mic that needs 48V phantom power to work. check.
I've got a 48V phantom power supply. check.
It has a XLR INPUT and a XLR OUTPUT.


Now, my question is:

Can I make a cable (XLR) to (1/8") to connect that OUTPUT into my PC SOUND CARD input (green jack)????


Connecting:
pin XLR-1ground to 1/8"-ground
pin XLR-2hot to 1/8"-left
pin XLR-3cold to 1/8"-right


I will fry my PC????? Or it will get some sound??



In case it works, I have another theory:


Since hot and cold are out-phased in 180º, with Pro Tools if I reverse Cold,
it will get a 2 times boost in the amplitude when I sum both signals.
Also, assuming the noise were the same in hot and cold before I reverse cold... The noise will also be inverted, which would give me a noise suppressor, because the noises are exactly the same in each pin, but out-phased after I inverted, therefore one noise would cancel each other.

Does it work???

Thanks everybody!

 

[jplesset]

Most PC sound card mic inputs are mono, with pin 1 and 2 shorted. If ou connect the way you propose, you will get silence. Tried it many times.
Leave the sleeve (connection 2) off, and see if you get anything. also try connecting it to ground...

 

[jaocaetano]

Actually, 1 and 2 are not shorted. Sleeve is ground, ring is Bias voltage and tip is signal.

But I want to plug it into LINE IN and not MIC IN.



Once LINE IN is Ground, Left signal and Right Signal.. I'm still wondering if I can:

Sleeve: Ground.
Ring: Cold XLR.
Tip: Hot XLR.
Can I???


Thanks!

 

[jplesset]

To connect a mic to a line-in, you will need a mic preamp Mic output is far to small for line in..... and indeed a line in has left/right on the tip/ring.