Sabay Audio Lab
Browser-powered media tools

Create better audio & video, right in your browser.

Sabay Audio Lab is a growing collection of simple creator tools. Master a song, build a professional video loop, and use future media utilities without installing desktop software.

AVAILABLE TOOLS

Local-first processing

Mastering and video-loop processing are designed to run on the visitor's device, reducing unnecessary uploads and keeping the workflow quick.

Simple creator workflow

Choose a tool from the Home page, load a file, adjust only the controls you need, preview the result and export.

Built to grow

The navigation and tool-card system can add new utilities later without making first-time visitors guess what the website does.

How Sabay Audio Lab works

01 · CHOOSE

Start from Home and choose the media tool that matches your task.

02 · CREATE

Load your own audio or video and tune the result with clear, purpose-built controls.

03 · EXPORT

Preview before exporting. Processing is performed locally whenever the browser supports it.

About this creator toolkit

Sabay Audio Lab focuses on practical browser-based media tools for musicians, video creators and everyday users. Each tool has its own workspace while Home explains what is available, so the site remains understandable as new features are added.

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Frequently Asked Questions (FAQ)

Everything you need to know about Sabay Audio Lab's client-side browser tools.

Are my media files uploaded to any server?

No. Sabay Audio Lab operates on a 100% local-first architecture. All audio synthesis, video decoding, color grading, and rendering happen right inside your browser using modern Web Audio, WebCodecs, and HTML5 Canvas technologies. Your raw media files never leave your device.

Is Sabay Audio Lab free to use for commercial projects?

Yes. All tools on Sabay Audio Lab are free for both personal and commercial content creation. You retain full copyright ownership of any mastered audio, video loops, relaxing ambience videos, or batch YouTube Shorts you create.

What audio and video formats are supported?

Our tools support high-fidelity audio formats (WAV, MP3, FLAC, AAC, OGG) and standard browser-decodable video formats (MP4, WebM, MOV). For mastering, lossless formats like 24-bit WAV or FLAC are strongly recommended for maximum dynamic range.

Why does long video rendering require local storage permissions?

To produce hours-long 1080p, 4K, or high-frame-rate videos without crashing your device's RAM, our engine streams rendered segments directly to disk via browser OPFS (Origin Private File System) or your designated Work Folder.

Mastering Studio

1-Tap mastering with 9 studio-grade profiles, A/B preview and transparent limiting.

● WebAudio Engine ● True 3-Band Dynamics ● Transparent Limiter

Drop audio file here
or click to browse

WAV · MP3 · FLAC · AAC
(recommended: WAV/FLAC)

Original0:00 / 0:00
Mastered (Preview)0:00 / 0:00
Original
--
LUFS est.
Mastered target
-14.0
LUFS
Sample peak
--
dBFS
Mastering Presets (BandLab-style)
9 tuned profiles optimized for loudness, clarity and musicality.
Ready. Load a song to master.
Mastering Controls (Manual / Advanced)
Every slider below changes the real live DSP and the exported WAV.
Input Gain0.0 dB
Low EQ0.0 dB
Mid EQ0.0 dB
High EQ0.0 dB
Comp Threshold-22 dB
Comp Ratio1.5:1
Saturation0%
Stereo Width100%

Understanding Professional Audio Mastering

True 3-Band Dynamics

Mastering divides the frequency spectrum into Low (<220Hz), Mid (220Hz–3.2kHz), and High (>3.2kHz) bands. Each band receives independent compression to glue the mix together without squashing dynamic musical transients.

Target Loudness (-14 LUFS)

Major streaming platforms like Spotify, Apple Music, and YouTube normalize tracks around -14 LUFS. Our presets push perceived loudness while maintaining safe peak headroom (-1.2 dBFS) to eliminate digital inter-sample distortion.

Tape Saturation & Stereo Width

Gentle analog-modeled tape curves introduce warm even-harmonic overtones, softening harsh digital highs. Mid/Side stereo processing broadens spatial width while preserving mono punch in the bass frequencies.

VIDEO TOOL

Professional Video Loop

Build a closed cyclic loop: trim a short head segment, wrap it over the tail, then blend picture and audio so the file can repeat cleanly.

● Local processing ● No upload ● Cyclic wrap
LOOP WORKSPACE
STABLE ENGINE
Drop video file here
or click to browse
MP4 · WebM · MOV (browser-decodable)
0:00.00:00.0
Auto Loop Blend0.60s
Head wrap length
Loop end0.0s
Repeats3×
Audio always uses equal-power fade.
Audio Volume100%
Preview + exported loop audio.
LOOP MATCH
Waiting
PREVIEW DROPPED FRAMES
0
AUDIO WRAP
Equal Power
HEAD WRAP
Preloaded at 0.00s
Load a video, review Auto Loop Blend, then click Generate Loop Video.

How Cyclic Video Looping Works

Cyclic Wrap Algorithm

Rather than standard ping-pong or harsh jump-cuts, our engine trims a calculated head segment, offsets the main timeline, and wraps the beginning frames over the tail. This guarantees that the final frame matches the initial frame's trajectory exactly.

Equal-Power Audio Crossfade

Sudden audio cuts produce audible clicks and phase pops. Our audio renderer applies a logarithmic equal-power crossfade curve between the tail and wrapped head, preserving constant energy across the loop boundary.

Sample-Accurate Sync

30 FPS frame rate boundaries and 48 kHz PCM audio blocks are mathematically aligned to avoid partial frames or audio drift when repeating the file continuously on digital signage, live streams, or YouTube.

100% LOCAL PROCESSING

Relax Video Maker

Create long relaxing videos from already-looped clips, images, original clip audio, background music, nature sounds and professional titles. Files stay on this device.

No upload · No render server
RELAX WORKSPACE
STABLE ENGINE

1. Source Media

LOOP-READY · REPEAT TO DURATION
PLAYLIST ORDER · TOP TO BOTTOM Drag or use ↑ ↓
No media added yet.

Live Preview

16:9 · 1920×1080
Waiting for media

Multi-Layer Sound Mixing

Combine up to three independent audio streams locally: original ambient video audio, sequential background music with customizable crossfades, and natural sound effects (rain, river, waves) with individual volume controls.

WYSIWYG Title Compositor

Design professional sleep and study video titles directly on canvas. Features customizable typography, drop shadows, opacity fading, automatic letter casing, and independent start/end display timing.

Deterministic Timeline Engine

Unlike real-time screen recorders, our deterministic renderer decodes frames by exact timestamp and writes encoded MP4 chunks directly to disk, ensuring 100% frame fidelity even for 8-hour rendering sessions.