Playing a sound from background kivy service

Im trying to get the background service to play a sound. Im using oscpy to get a background service running and all is working. But cant find out how to get it to play a sound. Hope someone can help me with it.
Tried with

from kivy.core.audio import SoundLoader
sound = SoundLoader (‘test.wav’)
if sound:
sound.play()

But no sound. Only works if i run it in the main.py