Specific to recording (information, not music) fiber channel has been used on high end server systems for a number of years. If you've ever worked with a PC to install a hard drive, imagine being able to replace that ribbon cable with a single piece of glass, and attach it to a massive amount of storage running somewhere else in the room.
A single strand of optical fiber can carry as much as 40 gigabytes of data per second. That's like seven full DVDs per second.