Audio is not purely emulated from the game ROM.

FarSight had to make a call back in 2012 regarding performance, and the ability to "hook into" the sound stream to detect goals based on audio calls.

Mobile platforms of that era were not capable of natively emulating the audio from the game ROM, along with locking the Frames Per Second (FPS) at the required 60fps for correct physics. Physics, and the way a table plays, is more important than purely emulating sound. Sound was given second-billing.