Gaudio Sing: The AI karaoke solution, reimagined

From original audio to real-time scoring, Gaudio Sing brings studio-grade performance to every device

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Studio-Quality AI Karaoke with Original Tracks

Deliver a premium karaoke experience with high-quality original backing tracks, pitch & tempo control, TrueScore™ for high-precision real-time scoring, and our exclusive SmartFill™ technology — an AI-powered feature that brings back vocals or instruments when the performer drops out. Seamlessly integrate Gaudio Sing into your platform and give users the sound of confidence — whether they’re singing, playing, or pausing.

Key features of Gaudio Sing

High-fidelity karaoke with original tracks
Say goodbye to MIDI — sing with studio-grade sound Gaudio Sing delivers high-fidelity backing tracks generated directly from original studio recordings. Using our proprietary GSEP™ (Gaudio Source Separation) technology, vocals are carefully removed while preserving the full depth and detail of the original mix — resulting in a karaoke experience that is immersive, authentic, and true to the source. This is high-fidelity karaoke, reimagined for modern creators.
Original track karaoke
High-quality accompaniment
AI audio separation
GSEP™

SmartFill™: Real-time support for every performer with flawless performances
AI automatically supports your performance in real time, so you never miss a beat SmartFill™ steps in when you step back. Whether you miss a note, pause mid-song, or take a break, SmartFill™ intelligently fills in the gaps with the original vocals or instruments — keeping your performance smooth and complete. This is a signature feature of Gaudio Sing because SmartFill™ works directly with the original track — something MIDI-based karaoke systems can never replicate. Behind SmartFill™, Gaudio’s proprietary Smart-Sense algorithm analyzes your live microphone input in real time and responds instantly. This feature delivers a natural, confidence-boosting experience for singers and musicians alike. It’s like singing a duet with the original artist — giving you the freedom to tackle even the most challenging songs, all backed by SmartFill™.
Automatic, real-time fill with original vocals or instruments
Powered by GSEP™
Uses original tracks
Perfect for vocal and instrument training

AI-Powered lyric sync & Furigana support
AI-driven karaoke lyric alignment and furigana generation for scalable, real-time multilingual content With GTS™ (Gaudio Text Sync™), lyrics are synchronized with music time codes quickly and accurately. The traditionally manual process of lyric synchronization is now fully automated, enabling large-scale operations of over 10,000 songs per day while dramatically reducing time and cost. The system also features AI-generated furigana (phonetic guides) for Japanese lyrics, improving accessibility for complex scripts. Built on Gaudio Lab’s proprietary multilingual text processing engine, this feature is optimized for seamless localization across global markets.
Karaoke lyrics sync with furigana support
Language-agnostic alignment
GTS™

TrueScore™: An advanced scoring system that accurately reflects your true performance
Not just loud — but accurate, expressive, and fair Traditional karaoke systems often score singers based only on volume, ignoring true vocal technique. Gaudio Sing goes further: it analyzes the user’s vocals in direct comparison with the original artist’s performance, isolated using GSEP™. The system evaluates pitch, timing, vibrato, and vocal expressiveness to deliver intelligent, AI-powered feedback that truly reflects a singer’s skill. TrueScore™ is the world’s first system that evaluates how closely your singing matches the original artist.
Accurate karaoke scoring
AI vocal evaluation compared to the original singer’s performance
Expressive singing feedback
GSEP™

Full control at your fingertips
Pitch(key) and tempo control, without compromise Shifting the pitch or tempo of an original song is technically challenging — naive shifting often distorts percussive sounds and other transient elements. With GSEP™, Gaudio Sing isolates drums and other transients before adjusting melodic layers. Then, our proprietary GFX™ (Gaudio Filter eXtension™), a studio-quality DSP engine, shifts pitch or tempo exactly as the user wants, without sacrificing audio fidelity. Whether you’re lowering the key, changing the speed, or adding natural reverb, Gaudio Sing delivers real-time control, making the adjusted pitch and tempo sound as if they were the original performance.
Pitch(key) and tempo control without distortion on the original track
Powered by GSEP™
Studio-quality processing with GFX™
High-fidelity karaoke effects

Looking beyond karaoke: practice-ready for any instrument
Not just for singing — Gaudio Sing is built for musicians, too Thanks to its modular architecture, Gaudio Sing enables more than karaoke. Users can mute specific instruments like bass, drums, or guitar — and rely on SmartFill™ to automatically bring them back in when they stop playing. This makes it perfect not only for performance support but also for instrumental practice and music education. With GFX™, users can slow down or change the pitch of the original song without any loss in sound quality. It’s a powerful way to learn and rehearse with the actual track, not a MIDI imitation. Whether you’re singing, playing, or learning — Gaudio Sing adapts to you.
Instrument practice & AI backing track
SmartFill™
GFX™ & Tempo control
Original track
Music education
How It Works

How does Gaudio Sing work?

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Smart architecture, real-time performance — powered by hybrid processing

Gaudio Sing uses a hybrid architecture that combines server-side intelligence with lightweight, real-time processing on the client side. This design enables studio-quality karaoke experiences while overcoming copyright restrictions and device limitations.

Server-side (Server tools): Smart metadata, not audio
With Gaudio Sing, pre-separated vocal/instrument audio files are neither saved on servers nor transferred to devices. Instead, our Server Tools performs the heavy lifting: it analyzes the original track using our proprietary GSEP™ (Gaudio Source Separation™) engine and generates separation metadata, “GSEP Metadata” — a compact, high-precision blueprint for real-time vocal/instrument isolation. The GSEP Metadata — together with the original audio and synchronized lyrics (via GTS™) — is delivered as a lightweight package to the device, enabling real-time separation and SmartFill™ functionality.
Client-side (Player SDK): Real-time playback, light compute
On the client (device) side, the Player SDK utilizes pre-generated GSEP metadata from the server to generate sing-ready audio in real time with minimal computation. Thanks to this hybrid architecture, high-quality source separation is possible even in resource-constrained environments such as in-vehicle infotainment systems, mobile devices, TVs, and smart speakers. This also provides the foundation for the seamless operation of Gaudio Sing’s unique and differentiated features. This approach ensures:
High-quality, low-latency source separation
Real-time, high-fidelity pitch and tempo control
Synchronized lyrics display with ms precision
Full-feature support for SmartFill™
TrueScore™ & A variety of real-time vocal effects
Offline mode: On-device AI karaoke
In certain usage scenarios, cloud connectivity may be limited or unavailable. In such cases, Gaudio Sing runs in offline, on-device mode. In this mode, the Player SDK leverages its built-in on-device AI model to perform real-time source separation. The Gaudio Sing Player SDK supports both hybrid and offline deployment models, enabling flexible operation across diverse environments. While audio separation quality or lyric synchronization accuracy may be somewhat limited in offline mode, it still provides a valuable solution in situations such as: 1. When supporting diverse audio input sources (e.g., radio, streaming, USB) as in a car head unit 2. When subscription- or account-based service models are not feasible 3. When operating standalone devices without internet connectivity

Why it matters

This hybrid architecture makes Gaudio Sing uniquely suited for partners facing:

Delivering high-quality karaoke based on original tracks while fully complying with complex music copyrights

Device compute limitations

High expectations for sound quality and lyric sync

Diverse markets, from connected apps to disconnected hardware

It’s not just simple karaoke software —it’s a smart, scalable solution designed to address real-world market challenges.

Application use cases of Gaudio Sing

One solution, many environments — built for flexibility

The Gaudio Sing solution is architected for seamless integration across a wide range of karaoke applications — from connected cars and smart devices to traditional karaoke rooms and portable machines. It supports both hybrid cloud and offline on-device deployments, enabling global scalability with local adaptability.

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In-car Infotainment

Bring high-fidelity karaoke to the driver’s seat Gaudio Sing enhances in-car entertainment systems with a fully interactive karaoke experience. Using our hybrid architecture, the system delivers server-prepared karaoke streams (original song + separation metadata + synced lyrics) to the car, where the embedded player SDK performs lightweight, real-time playback and effects.

Ideal for: connected cars, ride-share systems, rear-seat entertainment

Music Streaming & Smart Devices

Add karaoke to any screen or speaker From mobile apps to smart TVs and set-top boxes, Gaudio Sing empowers music and media platforms to offer karaoke as a premium interactive feature. Thanks to its modular, hybrid architecture, streaming services can leverage cloud-generated karaoke streams — while devices handle real-time playback and control, including pitch/tempo shifting and SmartFill™, which seamlessly brings back vocals or instruments when the user drops out.

Ideal for: streaming services, mobile apps, TVs, smart speakers with display

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Traditional Karaoke Venues

Modern AI for a classic experience In countries like Korea, Japan, and China, karaoke rooms are a key part of entertainment culture. Gaudio Sing enables operators to upgrade these venues with real-time source-separated audio, precise scoring, and SmartFill™ — an intelligent fallback feature that brings back the original vocals or instruments when the performer drops out. All of this is powered by the original songs users love.

Ideal for: karaoke venues, bars, lounges, party rooms, private booths, entertainment complexes

Karaoke Machines & Boomboxes

For consumer-facing karaoke hardware, Gaudio Sing offers 1) Hybrid mode: karaoke streams and metadata are pre-downloaded, 2) Fully on-device mode: audio separation runs locally via embedded AI models. The offline option may reduce lyric sync or separation quality, but allows faster integration and simpler licensing, especially where server-based delivery of original tracks is restricted.

Ideal for: home karaoke consoles, portable karaoke boomboxes, markets with content licensing barriers

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FAQ

Frequently asked questions about AI Karaoke, Gaudio Sing