In other words, your sound will sound better. Interface cards connect into NuBus, PCI or TDM slots in the back of your computer. NuBus, PCI and TDM slots are all buses. Microphones Macs and some PCs are shipped with a small microphone. Although the microphone that comes with a computer works fine, you won't get professional-sounding sound with it.
Some computers come with audio players.
Audio players are applications that allow you to listen to sound files. You can easily determine whether or not you have an audio player by double-clicking or opening up a sound file. If you have an audio player, it will open and the sound will play. In a Macintosh, check for the Apple CD Audio Player, or another sound application, within the Apple Menu. The Apple CD Audio Player only plays music CDS inserted into the CD-Rom and isn't the true audio player needed for work with sound for websites.