How I Built a Browser-Native DAW with near Zero-Latency Pedal DSP and Free 24-Bit Exports

​Hey Dev.to! 👋
​I'm Ellis (@zellisorange). I recently launched Electric Baby Grand Studios (electricbaby.ca), a browser-native Digital Audio Workstation (DAW) designed to give musicians immediate access to recording tools, guitar pedal DSP, pitch correction, and uncompressed exports directly in a browser tab—no plugins or desktop installations required.
​I wanted to share a look at the technical architecture behind building a full recording studio using modern web standards.
​The Vision & Problem Statement
​Most web-based recording platforms lock fundamental audio utilities—like exporting uncompressed 24-bit WAV files, using pitch correction, or chaining guitar pedals—behind monthly subscriptions.
​My goal was to leverage the Web Audio API and modern client-side processing to build a zero-barrier, browser-native DAW that keeps core tools 100% free while running efficiently on almost any device.
​Technical Architecture & Core Features
​Zero-Latency Pedal DSP: Built custom audio nodes running real-time virtual drive/fuzz pedals (Klon Centaur, Metal Zone, Tone Bender), phaser, chorus, tremolo, and plate reverb directly from a USB audio interface input.
​4-Track Multi-Tracking & 32-Band EQ: Multi-track arrangement engine featuring an integrated 32-band EQUATUM EQ per channel for precise frequency shaping.
​Vocal Pitch Correction & Looper: Real-time auto-tune processing and non-destructive loop slicing/editing engine.
​Sample Chopper & Virtual Drummer: Includes a standalone sample chopper/time-stretching utility and an AI backing drummer.
​Client-Side Uncompressed Exports: Renders 24-bit/16-bit WAV files and MP3s directly in the browser with built-in mastering, avoiding unnecessary server processing for basic exports.
​Challenges with Web Audio
​Audio Latency & Buffer Sizing: Achieving direct-monitoring speeds for guitar playing required optimizing node graphs and keeping buffer sizes as tight as possible without causing audio glitches or dropped frames.
​Client-Side Rendering: Handling multi-track mixing, real-time FX chains, and 32-band EQ per track concurrently required careful memory management to prevent memory leaks during long recording sessions.
​Try It Out & Feedback
​The app is live and fully functional in your browser right now:
👉 https://electricbaby.ca
​I’d love to hear feedback from the Dev.to community! How does the DSP performance feel on your setup? If you've worked with the Web Audio API or AudioWorklets, I'd love to chat about architecture in the comments!

Comments

[Marcus Kim]

Running Klon Centaur, Metal Zone, and Tone Bender-style DSP alongside four tracks and a 32-band EQ per channel is an ambitious browser workload, especially during long recording sessions. Client-side 24-bit WAV rendering is a smart boundary because it keeps routine exports private and avoids turning server capacity into a pricing constraint. The engineering risk is the "zero-latency" promise: interface drivers, browser scheduling, buffer size, and device load still shape round-trip latency, so exposing measured latency and glitch counts per session could make performance tuning-and user expectations-much more honest.

[Ellis St Croix]

Thanks for the sharp insight, Marcus! You hit the nail on the head regarding the real-world constraints of web audio.
​You're completely right about round-trip latency—browser event loops, system-level buffer sizes, and interface drivers always introduce inherent overhead compared to native ASIO/CoreAudio drivers. Calling it "zero-latency" is definitely more about direct monitoring feel compared to typical high-latency web players, but from an engineering standpoint, OS scheduling and buffer configurations still dictate the actual ms floor.
​I really like your idea of exposing a session dashboard with measured latency, buffer status, and a dropout/glitch counter! That kind of transparency would be huge for helping users optimize their browser environment and set realistic expectations during heavy DSP sessions. Appreciate the feedback!