Sound In Server?

I want to know if anyone could give me a link or help me on how to add music to my gmod server, so everyone hears music when they play.

Be more specific. Do you want to be able to play a sound? Do you have any addons that help you do this? Do you have admin mods that do this?

I want it to be in game that plays when a flood round starts. And Not me myself playing it, like an automatic play that everyone hears. Right now I can’t specify any addons that would help.