ALSA

Sound is NOT built into base CorePlus, MicroCore or TinyCore, sound is implemented via extensions. I assume you are reading this because you a newbie.

Warning: These reasons are written for newbies, its an Unofficial recommendation.

• If you need skype –> ALSA (and suggest no Pulseaudio)
  
• If you need to change sound devices on-the-fly gui –> Pulseaudio (front end to ALSA)
  
• If you need to change sound devices no gui –> ALSA
  
• If you need easier surround sound –> Pulseaudio
  
• If you like command mode surround sound –> Try OSS
  
• If you have an ISA sound device –> Try OSS then ALSA
  
• If you need a sound modem (dial-up) plus normal sound out –> Likely to be ALSA
  
• If you need to use a webcam builtin mic –> Try OSS then ALSA
  
• If you need to play high quality sound files –> ALSA
  
• If you have a Intel device, that needs a tweak –> ALSA

OSS is easier to setup, but fewer people use it so you may not get the support you are looking for. ALSA is better suited to those with “better” sound devices or multiple sound devices or sound devices that need tweaked settings. As I have an intel device, that needs a tweak, multichannel sliders do no appear in my ossxmix image as OSS appears to not know how to handle my sound device. But ALSA had the same issue but was easier to resolve with some research.

good luck and click here for OSS wiki