I would like to transmit data and stream audio over an optical link. Can anyone advise me?

I'd like to transmit data between PCs with direct line of sight. I'd also like to transmit audio from a device to my home speakers using an optical link.

Really I want it to be a project for me to work on so if there's a COTS system ready-to-go out the box I'm not interested.

New to networking. I'm a design engineer but I don't deal with wires or sparks.

• What might the architecture look like?

• What components do you need?

• What programs do you need?

I just discovered project RONJA which might be a good starting point.