VoiceAnalyzer | HTML5 Audio App

ITEM TITLE ────────── VoiceAnalyzer | HTML5 Audio App

SHORT DESCRIPTION (160 chars) ───────────────────────────── Professional audio analysis tool. ITU-R BS.1770-4 LUFS, parametric EQ, peak limiter & WAV export. No install — runs in any browser.

FULL DESCRIPTION ────────────────

VoiceAnalyzer is a professional-grade voice recording analysis and processing tool that runs entirely in your web browser — no server, no plugins, no subscription.

Open the HTML file, drop in your audio, and in seconds you get a complete analysis with exact dB measurements and step-by-step repair instructions for every problem found.

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ WHAT IT DOES ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

PROFESSIONAL AUDIO ANALYSIS • Integrated Loudness (LUFS) — ITU-R BS.1770-4 compliant with proper K-weighting filter chain and dual-gating (matches Spotify, Apple Music, YouTube, broadcast specs) • True Peak — 4× oversampled inter-sample peak detection (−3 dBTP voice target, −1 dBTP streaming hard limit) • Loudness Range (LRA) — EBU R128 dynamic variation measurement • Signal-to-Noise Ratio — frame energy heuristic • Dynamic Range — EBU R68 block-based measurement • Clipping detection — sample-accurate, reports event count and longest consecutive run • RT60 / Room Acoustics — energy decay curve, T20, T30, EDT, C50 clarity, room type classification • EQ Analysis — 10 octave-band display + 7-type spectral pathology detection (proximity buildup, room boxiness, sibilance, etc.) • FFT Spectrum — real Cooley-Tukey radix-2 FFT, 4096-point, Hann windowed, averaged over full file • Spectrogram — time × frequency heatmap, iZotope-style thermal colors

ISSUES & FIXES REPORT Automatic detection of every audio problem with plain-English explanations and numbered repair steps including: → Exact dB values (“boost +3 dB at 3 kHz, Q=1.0”) → DAW-specific paths (Adobe Audition, iZotope RX) → Free plugin alternatives (TDR Nova, etc.) → Source fix suggestions (mic placement, room treatment)

PARAMETRIC EQ (8 BANDS) • High-Pass Filter, 6 bell bands, Low-Pass Filter • All bands start disabled — enable only what you need • Real-time frequency response curve (pure math, instant) • Heard live during playback via Web Audio API • “Apply EQ” button on report cards — loads fix suggestions automatically • Gain: ±18 dB | Q: 0.1–10 | Frequency: 20 Hz–20 kHz (log)

PEAK LIMITER • Ceiling: −12 to −0.5 dBTP (default −3 dBTP for voice) • Threshold: −24 to −1 dB (default −6 dB) • Release: 10–400 ms (default 80 ms) • Live gain reduction meter during playback

WAV EXPORT • Renders EQ + Limiter through OfflineAudioContext (faster than real-time) • 16-bit PCM WAV, original sample rate and channel count preserved • Downloads as originalname_processed.wav

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ THE INTERFACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

Adobe Audition-inspired DAW layout:

LEFT DOCK — Meters & EQ VU meter, ITU LUFS LED segments, analysis meter bars, full parametric EQ with curve preview

CENTER — Full-width analysis canvas Waveform, Spectrum / EQ / Spectrogram / RT60 views

RIGHT DOCK — Limiter & Report Peak Limiter controls, Issues & Fixes, All Metrics

PANEL FEATURES ◄/► buttons collapse panels to show full-screen center canvas ⤢ Detach button pops any panel into a draggable floating window Drag panel titlebar to reposition floating panels anywhere Drag resize handles to adjust panel widths Status bar always shows LUFS, Peak, LRA, SNR, RT60, Score

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ PERFECT FOR ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

• Podcasters checking loudness and noise before publishing • Voice actors reviewing deliverables before sending to clients • Audiobook narrators meeting ACX and Findaway specs • Content creators preparing voiceover for YouTube • Remote teams doing quick QC on submitted audio • Web developers building audio tools or integrating analysis

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ TECHNICAL ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

• Single HTML file — no dependencies, no build step • Works offline after initial load • All processing in-browser (Web Audio API) — audio never leaves device • Supports: MP3, WAV, FLAC, M4A, AAC, OGG, OPUS, AIFF • Browsers: Chrome 90+, Firefox 88+, Edge 90+, Safari 15+ • Zero server cost — host on GitHub Pages, S3, any static host

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ WHAT’S INCLUDED ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

✓ VoiceAnalyzerPro.html — The complete application ✓ documentation.html — Full user documentation ✓ README.txt ✓ CHANGELOG.txt

CATEGORIES ────────── Primary: Audio / Audio Plugins & Effects Secondary: JavaScript / Miscellaneous