FAQ
Beltr is an AI-powered karaoke app for your desktop. It uses neural-network vocal separation to turn any song you own into a karaoke track: vocals removed, lyrics on screen, phones as wireless remotes.
Drop any audio file into Beltr. The AI separates vocals from instruments in about 30 seconds. Synced lyrics appear on your TV or monitor. Guests connect their phones by scanning a QR code to queue songs and control playback.
Yes. A fresh install lands on two ready-to-play demos of the Beltr anthem: an HD AI version (vocals separated, word-synced lyrics, music-video background, live pitch scoring) and a classic CD+G / MP3+G version (the karaoke-disc path, rendered just like a hardware machine). They’re there so you can try both the second you open the app — and they bow out automatically the moment you import your first song.
The most reliable way is an HDMI cable from the computer running Beltr to your TV: zero latency, best audio, and pitch scoring works automatically since the microphone is on that same computer. You can also use your smart TV's built-in browser, AirPlay (Mac → Apple TV), or Chromecast. Native TV apps are live on both stores: Apple TV on the App Store and Android TV & Google TV on Google Play. See all setup options for the trade-offs of each.
8 GB RAM minimum (16 GB recommended), modern multi-core CPU, ~2 GB disk space for the AI model. Runs on macOS 12+, Windows 10+, and Linux.
Yes. The macOS build is signed and notarized by Apple, so it opens normally with no Gatekeeper warning. Drag it to Applications and launch.
Yes. After the AI model downloads on first run, everything runs locally. No internet connection required.
MP3, FLAC, and WAV files.
Yes. Drop in an MP3+G or CDG zip and it plays instantly, sitting next to your AI-made tracks in the library. Each disc-based track is marked with an “MP3+G” badge so you can tell them apart at a glance.
Yes. Beltr exports any track to MP3+G — the standard karaoke-disc format. Burn it to disc, drop it on a USB stick, or load it directly onto a hardware karaoke machine. Works with every karaoke machine made in roughly the last 30 years.
Yes. Beltr records your performance as you sing and creates a shareable vertical video clip. After each song, scan the QR code on your screen with your phone to open the clip, then tap Share to send it to friends or save it. The clip stays on your machine — nothing uploads on its own.
MP3+G is the standard karaoke-disc format: an MP3 audio file paired with a CDG file that paints synced lyrics on screen. It’s what every commercial karaoke disc and karaoke machine uses. Beltr both imports and exports MP3+G.
30 seconds to 2 minutes per song, depending on your hardware. The first song takes a bit longer while the AI model downloads.
Demucs v4 is an open-source neural network from Meta Research that separates audio into 4 stems: vocals, drums, bass, and melody. It's the engine behind Beltr's vocal separation.
Beltr works with audio files you own. It does not stream from or connect to any streaming service.
Studio recordings produce the best results. Live recordings, tracks with heavy effects, or low-bitrate files may produce lower-quality separation.
Guests scan a QR code displayed on the TV screen. It opens a web page on their phone. No app download, no account required.
No hard limit. All connected phones can queue songs, browse the library, and vote on what plays next.
No. The remote works in any modern mobile browser. Nothing to download or sign up for.
The remote needs no app — it runs in any browser. For singing, there’s Beltr Remote: Karaoke Mic, a free app that turns your phone into the wireless microphone for live pitch scoring. It’s on the App Store and Google Play now.
$19.99, one-time purchase. No subscription, ever — you own it.
The full app with 5 song separations. No credit card required, no time limit.
The app still works. You can play any songs you've already processed. It won't process new songs until you buy a license.
Yes — a no-questions-asked 14-day money-back guarantee. If Beltr isn’t for you, email support@beltr.app within 14 days of buying and you get a full refund. (You can also try 5 songs free before you ever pay.)
Each license key works on up to 2 devices.