Casino resorts and entertainment venues already run on sound: lounge music, showroom audio, arena PA, and video walls in every walkway. They also run constant promotions, from dinner offers to show-night upgrades to loyalty perks. The gap is the moment in between, when a guest hears about an offer and then has to remember it, find it in an app, or ask someone. An inaudible tone can close that gap. A phone with the venue's app, and the guest's permission, recognizes the tone and saves the right offer at the right place.
How it works
A short, inaudible tone is mixed into audio that already plays in a space. When it plays, a phone running an app with tone detection, and with the user's microphone permission, recognizes the tone and does what the venue chose ahead of time:
- Save an offer to the app's wallet or offers tab.
- Show content tied to that spot, such as a menu for the restaurant nearby or the night's lineup outside a showroom.
- Log a visit to a zone, so marketing can see which spaces drive opt-in engagement.
The tone is only one part of the system. It needs an audio source in the space, an app guests already use, and a clear plan for what happens next.
Where tones fit in a venue
- Showrooms and theaters: pre-show audio that saves a drink offer or a merch discount for intermission.
- Restaurants, bars, and lounges: background music that saves a dining offer or a happy-hour reminder.
- Arenas and event halls: in-bowl audio and video segments during breaks, tied to a sponsor or concession offer. Our post on sports venue fan engagement covers that setting in more depth.
- Walkways, lobbies, and video walls: digital signage with audio that points guests toward dining, shows, or retail.
- Hotel areas: pool decks and lobby lounges, covered in our guide to hotel and resort guest experiences.
Many of the easiest wins are non-gaming: food, drinks, shows, retail, and spa. Those offers reach more guests and bring fewer compliance questions.
Compliance and responsible gaming come first
Gaming venues are among the most regulated places a brand can run a promotion. A tone program should be built for that from day one:
- Bring in the venue's compliance team early. Any offer that touches gaming, such as free play, tournament entries, or loyalty points tied to play, needs their review against the rules of the venue's gaming regulators.
- Gate gaming offers to adults 21 and over. The American Gaming Association's Responsible Marketing Code for Sports Wagering, for example, says sports betting messages should not appeal primarily to people under 21, the prevailing legal wagering age.
- Keep the language responsible. The same code bans "risk free" language and messages that suggest success is guaranteed or encourage chasing losses. Apply that standard to every gaming-related offer.
- Include responsible gaming messaging where the venue's policy calls for it.
- Keep all-ages spaces separate. Arenas, theaters, and family areas can have guests under 21, so offers there should stay non-gaming.
Review the plan with the venue's legal and compliance teams before anything goes live. GhostTones builds the audio and app experience; the venue owns its gaming compliance.
Test on site, not in the studio
Venue audio is hard on any signal. Slot floors and arenas are loud, showrooms use heavy audio processing, and lounges play music at low volume. The playback chain, from the media player to the mixer to the speakers, can change the tone before it reaches a phone.
Every pilot starts with an on-site test:
- Map the audio chain in each space, from the final file to the speakers.
- Test at real times, including a busy show night, with a range of phones in hands, pockets, and bags.
- Set expectations by space. A quiet lounge and a packed arena will not behave the same way.
We share expected results only after that test, never before.
Consent comes first
A phone has to listen to recognize a tone, so the app needs microphone permission, and iOS and Android both ask the user before granting it. For casino and entertainment venues, the natural home is the venue's own app or loyalty app.
- Explain the value before the system prompt, such as offers for shows and dining while you are on property.
- Make it optional, so the app works fully for guests who say no.
- Disclose tone use plainly in the app's privacy notice.
- Skip pushy alerts. Save offers quietly and let guests open them when they are ready.
Our consent and permission UX checklist for tone apps walks through the full permission flow.
Measure what matters
Plan measurement before the first tone plays. Track how many guests have the app, how many granted microphone permission, how many tones were detected in each space, and how many saved or redeemed an offer. Break results down by space, time of day, event, and offer type. Our guide to measuring opt-in rates for tone-triggered campaigns lays out the full funnel.
Frequently asked questions
Can guests hear the tone?
GhostTones tones are designed to be inaudible to most people, so they can sit inside existing venue audio without changing what guests hear.
Does every guest get the offer?
No. Only guests with an app that includes tone detection, who have granted microphone permission, can receive a tone-triggered offer.
Can tone-triggered offers include gaming promotions?
Only with the venue's compliance team involved. Gaming offers need regulatory review, should be limited to adults 21 and over, and should follow responsible gaming standards. Many venues start with dining, show, and retail offers.
Will a tone work on a loud casino floor or in an arena?
It depends on the space. Speakers, audio processing, and crowd noise all affect detection, so every pilot starts with an on-site test at real times.
Plan a venue pilot
GhostTones builds B2B inaudible-tone and experiential audio programs for brands, agencies, venues, and their partners. Talk with CEO Curtis and CRO Jerry Reid about a casino or entertainment venue pilot at ghosttones.com.
Plan a venue pilot and we will help you test each space, design the consent flow, and set up measurement before the first promotion runs.