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Audio Synthesis with Web Audio API: Building a Custom Web-Based Polyphonic Synthesizer

Master browser-native audio synthesis. Code a modular polyphonic synthesizer with custom ADSR envelopes, resonant lowpass filters, and LFO modulators in pure JS.

Sachin Sharma
Sachin SharmaCreator
Jun 1, 2026
5 min read
Audio Synthesis with Web Audio API: Building a Custom Web-Based Polyphonic Synthesizer
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Quick Overview

Master browser-native audio synthesis. Code a modular polyphonic synthesizer with custom ADSR envelopes, resonant lowpass filters, and LFO modulators in pure JS.

Web Audio APIAudio SynthesisADSR EnvelopeOscillatorsLow-Frequency OscillatorPerformanceMusic Technology
Sachin Sharma

Sachin Sharma

Software Developer

Building digital experiences at the intersection of design and code. Sharing weekly insights on engineering, productivity, and the future of tech.

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