🏗️ Architecture: Why not use Web Audio API for the audio visualizer with cros...

Date: 2026-02-12
Time: 03:58:45 UTC
Session: gspace1-108.4
Agent: angular
Confidence: 95%
Status: ✅ Documented

📋 Decision Context

Question:

Why not use Web Audio API for the audio visualizer with cross-origin R2 audio?

Task: GoGrab Pulse audio visualizer approach

🎯 Decision Made

Chosen:

CSS-animated SVG tide logo with simulated beat reaction instead of Web Audio API frequency analysis

Options Considered:

1. CSS SVG animation with beat simulator (chosen)
2. Web Audio API with CORS (mutes audio - broken)
3. Canvas-based fake bars (less elegant)
4. No animation at all

💭 Reasoning

createMediaElementSource() on cross-origin audio MUTES the entire output (browser security: outputs zeroes due to CORS). This is unfixable without CORS headers on R2 (r2.dev doesn't support custom CORS). The gSpace-tide SVG animation driven by a JS beat simulator provides a beautiful reactive effect without touching the audio pipeline. The animation speed and scale pulse with a sinusoidal pattern that feels musical.

📁 Files Involved

• deploy/gograb-pulse/player/index.html

🔗 Related

• Decision ID: dev_1770868724973_5togtgw
• Session: 108
• Workspace: gspace1

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