How to connect Sound Card to BNC

Howdy!

Since I’ve actually received this question a couple of times, I figured I’d post the answer here, in case anyone is wondering but afraid to ask.

Connecting your sound card to BNC, either for feeding an exciter with MPX, or recording MPX from a hardware processor, if you have a card with quarter inch plugs (M Audio Audiophile 192, ESI Juli@), is as easy as this:

and this:

and this:

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On the other hand, if you’re using a card with 1/8 (3.5mm) jacks, or on-board sound, all you need is this:

and this:

Connect only one of the RCAs, leave the other hanging.

There’s really nothing to it. MPX is an analog signal, all you need is ground and signal and you’re good to go.

///Leif