I completely disagree with you here, I think audio/music is a key element of the theme park experience. It helps create an atmosphere, I find it puts people in better spirits and it creates a sense of identity and theme ... however I love the idea that the majority of main public pathways in the park will have audio to accompany them.
It certainly is, its probably a bigger part of the experience than any guest realises because a lot of what it does is subconscious. I love themed music/sound design and what you can do with it, but it needs to work from a design point of view. Not a view to 'immerse guests' everywhere by putting twinkly music on a loop on every transitional pathway
You wouldn't set out to design a park with music absolutely everywhere, like even on the transitional paths. You'd want to create pockets of energy and atmosphere, with rest areas in between and natural ambience. Or at least far more subtle than what I've heard of the heritage track currently.
A guest doesn't walk through each area getting 'themed at', they will be talking and inhabiting each space, having a good time. Alton Towers has the benefit of being so large that audio bleed is less likely to matter between areas, but in most parks that overdo background music it creates a horrible noisy inescapable atmosphere of audio playback. Unless it's subtle and more soundscape than music, I think enthusiasts often have a slightly distorted view of how to use background audio.
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For example, the Smiler music in the queueline - brilliant I think, it is by far the least subtle music on park, constant beat and addictive deranged sound - but that suits the ride. It builds the energy as the coaster dives above your head. Every guest feels that and its great (ok the 'ha ha ha' parts are annoying but...), then as you go inside it becomes quieter & more ominous; by the time youre out the other end, the same theme is warped and distorted just as your head is spinning from the ride, it's witty and a cool touch too. That's how you use music actively. Without any audio changes there, it would just feel dead.
Whereas you would not put music around Oblivion's drop, where the screams, suspense and natural sound of the ride banging into the tunnel is more powerful than any music on a loop . In Oblivion's queue there is not a constant theme tune or IMAscore-style track to force the theme on you. Instead, it builds up great tension with an industrial soundscape and the constant views to the drop you're heading for. Then, inside each building, it creates audio highlights with the music and SFX of the video. It's an audio dynamic and it works by design, it's great.
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I do care greatly about audio and its uses, because of how brilliant it can be when done well. But if done from the point of "we must have music everywhere to keep guests immersed", I think that's badly informed approach to designing a theme park, even if it's done with positive intention.
Especially if its really on-the-nose like the heritage track sounds currently.