I actually found it in the set-up menu but the strange thing is it was set for reel spin and stop sound but nothing, I could only get it to work on reel spin sound only.
There's a mistake in the PSRs for the S+ machines when it comes to the description of the reel spin sounds. It's in every PSR that references them, and I don't know why IGT never fixed it. Either nobody noticed, or nobody cared. I've posted the following before in a different thread about the same issue -- here it is here for your enjoyment:
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According to the PSR, the page zero option 2 controls the reel spin music. The PSR states:
Reel-Spin Sound <0> [2] Options are reel-spin tones and reel-stop sounds {0} or reel-spin tones only {1}.
This is
wrong. Despite what IGT claimed in the PSR, the two options are A) reel spin tones with the handle solenoid activated quickly at the stop of each reel (to generate the Clack, Clack, Clack of the reels stopping), OR B) no reel spin tones, simulated "stop" sound from the speaker only.
I'm not in front of a machine right now so I can't state which option (0 or 1) correlates to each of those two descriptions, but if you're not getting reel spin music on one of the settings, try the other setting. Only one of the two options will actually play music/tones when the reels are spinning.