Connecting your computer to your audio

There are two ways to connect your computer to your audio.

Analogue

The sound card of the computer does the conversion to analogue. You connect the analogue out of the computer to the analogue in of the amplifier.
Often the quality of the on board sound card is only moderate. In case of a desktop, you can replace it by a better on. In case of a laptop you can't so a digital out is the only way to improve on it.

Digital

The output of the computer is digital. It is converted to analogue by an outboard sound card.

SPDIF

In the audio world SPDIF is the standard to connect audio equipment digital.
This standard is less common in the computer world. There are sound cards having SPDIF out.

You connect it to a DAC or a receiver with digital in..

USB

In the computer world USB is the standard. Slowly more and more audio manufactures are producing high quality audio components with a USB input.

Streaming

Streaming audio players use the network to connect to a server.
It all started on the internet (internet radio) but if you can play music located on a server somewhere on the internet, you can use the same technology to play the music on a PC,or  a NAS in your home network.
You see more and more AV equipment supporting the DLNA standard.
In principle, all equipment supporting this standard can communicate with each other.
Modern TV’s can show the pictures on your PC.
Why? Both are networked and both are DLNA compliant.