Originally Posted by ilike2music
I've heard people talk about spdif connections a lot, but I always wonder: what exactly is SPDIF? What is it used for? What are some practical applications?
to make a long story short:
There's two types of ways to transmit audio.
1. Analogue (RCA, TRS, XLR etc)
2. Digital (Spdif, ADAT, etc)
So Spdif is one kind of digital audio transmission. You are likely to see it on a decent audio interface or even at the back of high quality CD-players for example.
There's a lot more to it, but this is the basic explanation IMHO.