Why We Built Audio369
For years, performing routine audio tasks required a frustrating compromise. Creators needing to trim an interview, normalize loudness, adjust musical pitch, or convert a master recording between formats faced two unattractive options. They had to install heavy desktop digital audio workstations with complex licensing, or upload sensitive voice recordings to ad-cluttered online converters that stored files on remote servers.
Audio369 was created to provide a faster, private alternative. By harnessing the capabilities of modern browsers, including the HTML5 Web Audio API, WebAssembly (WASM), and Web Workers, we engineered a complete suite of 59 digital audio tools that execute entirely within your local web browser session.
No upload queues or network bottlenecks. Audio encoding and digital signal processing run directly on your CPU.
Your voice memos, studio sessions, and commercial audio files never leave your device or get sent to remote servers.
32-bit floating point internal DSP calculations, ITU-R BS.1770-4 loudness compliance, and clean lossless exports.
Our Architectural Principles
Audio processing in Audio369 follows strict engineering principles designed to preserve acoustic integrity while maximizing execution speed across laptops, desktops, and mobile devices:
- Client-Side Web Audio API: All audio decoding uses native browser decoders that unpack compressed containers directly into raw pulse-code modulation (PCM) sample buffers stored in temporary memory.
- Compiled WebAssembly Encoders: Format conversion utilizes industry-proven encoders compiled to WebAssembly, including LAME for high-fidelity MP3 generation and ffmpeg.wasm for lossless FLAC and streaming AAC packaging.
- Dedicated Background Web Workers: Heavy mathematical operations, such as 4096-point Fast Fourier Transforms (FFT), phase vocoder pitch shifting, and sample rate conversion, run in background worker threads to keep user interfaces responsive.
- Immediate Memory Clearance: Temporary audio buffers exist solely in transient system RAM during active editing sessions and are wiped automatically when you close or refresh your browser tab.
Professional Acoustic Compliance
Unlike basic utilities that perform naive clipping or rely on inaccurate header durations, Audio369 tools are calibrated to professional audio engineering specifications:
Our loudness meter implements the standard ITU-R BS.1770-4 algorithm with K-weighting filters to calculate integrated LUFS (Loudness Units relative to Full Scale) and true-peak levels (dBTP). This allows podcasters and mastering engineers to target exact distribution standards, such as -14 LUFS for Spotify and YouTube or -16 LUFS for Apple Podcasts. Similarly, our volume booster incorporates soft-knee peak limiters that control signal peaks without introducing harsh digital square-wave distortion.
Creator Ownership & Open Standards
We believe that essential creative utilities should be accessible, transparent, and completely free of subscription barriers. You retain 100% intellectual property ownership of every audio file processed on Audio369. We claim no licenses, copyrights, or royalties over your creations. Our mission is to keep expanding the capabilities of modern web browsers to deliver a dependable digital audio workstation for creators everywhere.
About the Creator & Studio Vision
Audio369 was engineered and is curated by Prathviraj, Founder & Lead Developer at GoTradly Technologies. High-resolution audio files, spoken interviews, and studio master tracks are inherently personal creative assets. Recognizing that modern browsers can execute 32-bit floating point digital signal processing and Fast Fourier Transforms natively via the Web Audio API, Prathviraj designed Audio369 as an accessible acoustic workbench. Creators, musicians, and podcasters can calibrate loudness to broadcast specs, adjust pitch, or convert master tracks instantly on their own CPU with zero cloud upload delays and uncompromised privacy.