Hi,  I'm working with some sounds in my mod but i want to control them with different triggers. I found the next alternative

Minecraft.getMinecraft().getSoundHandler()

But this only works to control sounds on SP. Exist an alternative to get the SoundHandler at Server side?

I'm using it for Stop, Pause and Play sounds

SoundHandler doesn't exist on the server, because the server has, of course, no concept of how to play a sound (or even what a sound is, other than some symbol in a registry).

 

If you want to control the playback/pause/stop of client-side sound playing from the server, you'll need to send custom packets to any interested clients.  This doesn't necessarily need to be an explicit play/pause/stop packet; you could control playback from a client-side entity or tile entity, for example, and there are already ways of sync'ing information to those.