FMOD Distance Parameter: At 0 distance the sound is very quiet when it's supposed to be full volume?

I have an object playing a music track from FMOD and as the player gets further away it gets quieter etc. and this all works fine.

However when the player is around 0.8 units or less away from the music object, the music is barely audible. So when game starts and the player is directly on the music object, there's barely any sound. You have to move a little bit away from it before it plays at full volume..

In FMOD at distance 0 the music is playing at the desired level but just when playing in Unity I have this little problem.

Any help is much appreciated! :)