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Silent disco – no headphone hire
Your Mac's music + everyone's own headphones = silent disco, done right. A silent disco (sometimes called a headphone disco) lets everyone dance to the same music in their own ears. The neighbours hear almost nothing. With RoomCast you can run one without hiring a crate of headphones or radio transmitters.
How does a silent disco from your Mac work?
The DJ or playlist plays on a Mac. RoomCast streams that sound over the venue's local Wi-Fi. Guests scan a QR poster, open the page in their phone browser, and listen on their own earbuds or headphones. No account needed, and the stream stays on the local network.
- 1
Set up the Mac
Install RoomCast, connect to the party Wi-Fi, and choose your music source.
- 2
Route a music app or DJ software if needed
For Spotify, another music app, or DJ software, install the free BlackHole 2ch driver and choose that source in RoomCast. Do this before the party.
- 3
Share the QR poster
Print or show the poster so dancers can join in a few seconds.
- 4
Join the party Wi-Fi
Ask guests to connect to the same Wi-Fi as the Mac before they scan the QR code, and to bring wired or Bluetooth earbuds.
- 5
Dance
Everyone hears the same mix, at their own volume, on gear they already own.
No headphone rental
Traditional silent disco hire means boxes of headphones, charging batteries, and radio packs to hand out and collect. That works for big festivals. With RoomCast, guests listen right in their phone’s browser on earbuds or headphones they already own — no headset hire and no radio transmitters to hand out or collect.
For a backyard party, school formal, wedding after-party or community night, that phone-based path is often enough: people bring earbuds, you bring the Mac and the Wi-Fi. Searching for “silent disco near me”? You may not need a hire company at all. If you already have a Mac and a decent access point, try RoomCast at home first, then take the same setup to the venue.
Ask guests to bring wired or Bluetooth earbuds. Keep a small spare bag of cheap wired earphones for anyone who forgets. Wired buds avoid Bluetooth delay for people who care about tight timing with the beat. About 50 phones on a modern Wi-Fi router can listen at once. The real number depends on the router, other traffic on the network, distance and walls, and the quality setting. Test your access point with a realistic number of phones before the party.
How does a silent disco from your Mac compare with headphone hire?
Traditional silent disco hire means boxes of headphones, charging batteries, and radio packs to hand out and collect. That works for big festivals. With RoomCast, guests listen in their phone’s browser on earbuds or headphones they already own — no headset hire and no radio transmitters to hand out or collect.
| Headphone hire | RoomCast on phones | |
|---|---|---|
| What guests listen on | Hired headphones paired with radio transmitters | Earbuds or headphones guests already own, in the phone’s browser |
| What you hand out and collect | Boxes of headphones, charging batteries, and radio packs | A QR poster. A small spare bag of cheap wired earphones helps anyone who forgets |
| What you run | A hire-company headphone and transmitter kit | A Mac running the free RoomCast app on the party Wi-Fi |
| Network | Radio transmitters for the hired headsets | Local Wi-Fi shared by the Mac and phones; no internet required on that network |
| How many listeners | Set by the size of the hire kit — this site does not quote a hire capacity | About 50 phones on a modern Wi-Fi router; the real number depends on the router, other traffic on the network, distance and walls, and the quality setting. Test your access point before the party |
| Delay | Depends on the hire kit — no public figure is quoted here | Usually around half a second, even on busy Wi-Fi; suits dancing, not lip-sync to live video |
| Where it fits | Big festivals and nights where you want a full hire setup | A backyard party, school formal, wedding after-party or community night, when people bring earbuds |
Playing from a music app or DJ software? You'll need the free BlackHole driver. It's a 10-minute one-time setup, so do it before the party. See the BlackHole music setup steps →
How does RoomCast compare with PartyParty and DiscoFish?
Other free apps also market a silent disco without renting headsets. The notes below are taken from their public product pages; check those sites for current details. No competitor latency figures are quoted here.
| PartyParty | DiscoFish | RoomCast | |
|---|---|---|---|
| Host computer | Mac App Store app; Apple silicon with macOS 26 or later (per their site) | Free desktop app for Mac, Windows and Linux (per their site) | Free open-source Mac app (macOS 13 Ventura or later) |
| How guests listen | Scan a QR code; listen in the phone browser (their FAQ describes Safari on a recent iPhone) | Browser QR on the local network; optional phone app pairing for listeners over the internet | Scan a QR code; listen in their phone’s browser |
| Headphone hire | Marketed as no rental gear; guests use headphones they already own | Marketed as no audio gear to rent; guests bring their own headphones | No headphone rental — guests use earbuds or headphones they already own |
| Network | Shared Wi-Fi; their site also describes a travel-router / offline path and cloud-relayed listening | Local network for browser listeners; optional internet path via their phone app | Local Wi-Fi shared by Mac and phones; no internet required on that network |
| Channels / scale | One live set for the room (per their marketing) | Up to six channels (per their site); capacity depends on network and computer | One broadcast per Mac; about 50 phones on a modern Wi-Fi router (the real number depends on the router, other traffic on the network, distance and walls, and the quality setting) |
| Delay | Described as staying close to the live room; local and cloud-relayed paths can differ — no public millisecond figure found | Says network conditions and headphones can affect latency — no public millisecond figure found | Usually around half a second, even on busy Wi-Fi; suits dancing, not lip-sync to live video |
Sources: partyparty.party, discofishapp.com. Product lines change — verify before you rely on a comparison for an event.
Where RoomCast fits: a free Mac host, guests listening in any modern phone browser, audio that stays on the local Wi-Fi, and a stated delay you can plan around. PartyParty and DiscoFish may suit you better if you need their host platforms, multi-channel parties, or remote listener paths — pick the tool that matches the night.
What tips help for a smooth night?
- Test the full path at home: music app → BlackHole → RoomCast → a phone on the same Wi-Fi.
- Use a solid access point. Guest networks that isolate clients can block phones from reaching the Mac.
- Tell people to join the correct Wi-Fi before they scan the QR code.
- RoomCast’s delay is usually around half a second, even on busy Wi-Fi. That suits dancing and parties; it is not meant for lip-sync to a live stage video.
- Make sure you have the right to play the music at your event — your own tracks, licensed playlists, or a venue licence.
What else is RoomCast used for?
The same Mac app also covers overflow rooms, parents' rooms and foyers, and a fair look at Listen Everywhere and AudioFetch versus a free Mac app.
See the silent disco card on the home page →
Questions about a silent disco from your Mac
Do guests need to hire headphones for a RoomCast silent disco?
No. Traditional silent disco hire means boxes of headphones, charging batteries, and radio packs to hand out and collect. With RoomCast, guests listen in their phone’s browser on earbuds or headphones they already own. Keep a small spare bag of cheap wired earphones for anyone who forgets.
How do dancers join a silent disco on their phones?
Connect each phone to the same local Wi-Fi as the Mac. That Wi-Fi does not need internet. Scan the RoomCast QR poster with the phone camera; the stream opens in the browser. No account needed.
Can I play Spotify or DJ software at a silent disco from my Mac?
Yes. For a music app or DJ software you currently need the free BlackHole 2ch driver. Route the app into BlackHole, choose that source in RoomCast, and press Broadcast. It is a one-time setup, so do it before the party. If you use Spotify or another streaming service, check that subscription’s terms for public or event playback — we cannot advise on what your plan allows.
How many people can listen to one silent disco broadcast?
About 50 phones on a modern Wi-Fi router can listen at once. The real number depends on the router, other traffic on the network, distance and walls, and the quality setting. Test your access point with a realistic number of phones before the party.
Will the music stay in time for dancing?
RoomCast’s delay is usually around half a second, even on busy Wi-Fi. That suits dancing and parties; it is not meant for lip-sync to a live stage video. Wired earbuds avoid extra Bluetooth delay for people who care about tight timing with the beat.
Do I need the right to play the music at a silent disco?
Yes. RoomCast just carries sound from your Mac. As with any speaker system, make sure you have the right to play the music at your event — your own tracks, licensed playlists, or a venue licence.
Free Mac app · listeners use the browser · local Wi-Fi
More questions? Read the RoomCast FAQ →