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feat(#623): adaptive noise gate via DynamicsCompressorNode - #907

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Shan7Usmani wants to merge 7 commits into
shouri123:mainfrom
Shan7Usmani:feat/623-adaptive-noise-gate
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feat(#623): adaptive noise gate via DynamicsCompressorNode#907
Shan7Usmani wants to merge 7 commits into
shouri123:mainfrom
Shan7Usmani:feat/623-adaptive-noise-gate

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@Shan7Usmani

@Shan7Usmani Shan7Usmani commented Jul 25, 2026

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Description

Implements an adaptive noise gate using the Web Audio API DynamicsCompressorNode to silence ambient noise before it reaches the transcriber, reducing Whisper API costs.

Changes

  • offscreenAudioGraph.ts: Added createNoiseGate() using DynamicsCompressorNode with adaptive threshold, high ratio, and fast attack to gate low-amplitude ambient noise
  • Audio graph now routes tab audio through the noise gate before the recorder destination
  • Microphone audio bypasses the noise gate (already has hardware noise suppression constraints)
  • Updated offscreenAudioGraph tests with MockDynamicsCompressorNode and routing assertions
  • TypeScript compiles clean, all 7 offscreenAudioGraph tests pass

Fixes #623

Shan7Usmani and others added 7 commits June 24, 2026 20:02
@Shan7Usmani
fix(shouri123#657): prevent HTML injection and XSS by sanitizing part…
86256fa 
…icipant names

- Fix initials derivation in createTranscriptEntryHTML to use escaped speaker
- Use sanitizeDataAttr for data-* attributes instead of escapeHtml
- Consolidate duplicate escapeHtml: deprecate sanitize.ts version, keep domHelpers.ts canonical
- Harden getEmptyStateHTML and truncatedNoticeHtml with escapeHtml for defense-in-depth
- Add domHelpers.test.ts with XSS, attribute-context, and regression tests
- Update sanitize.test.ts to import escapeHtml from canonical source
- Remove redundant DOM mock from sanitize.test.ts

Audit result: 0 active XSS vulnerabilities across all 47 innerHTML assignments.
@DeepeshKafalatiya @Shan7Usmani
docs: add detailed troubleshooting and common errors section to README
bf64afc
@DeepeshKafalatiya @Shan7Usmani
style: fix README.md formatting with Prettier
6cd8014
@Shan7Usmani
fix(shouri123#653): add worker-src, base-uri, form-action CSP directives
6f9ef64
@Shan7Usmani
feat(shouri123#639): enforce JSON mode for transcript refinement API
ff39627
@Shan7Usmani
fix(shouri123#630): auto-recover microphone on track end with dashboa…
bbd456e 
…rd toast
@Shan7Usmani
feat(shouri123#623): add adaptive noise gate via DynamicsCompressorNo…
383f703 
…de in offscreen audio graph
@Shan7Usmani
Shan7Usmani requested a review from shouri123 as a code owner July 25, 2026 07:43
@github-actions

github-actions Bot commented Jul 25, 2026

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🚀 Thank You for Contributing to Late-Meet

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  • the issue was assigned to you before opening this PR
  • the PR references the related issue
  • your changes follow repository contribution guidelines
  • the project builds successfully before submission

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Thank you for contributing 💙

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📥 Commits

Reviewing files that changed from the base of the PR and between d216444 and 383f703.

📒 Files selected for processing (10)
  • README.md
  • src/background.ts
  • src/dashboard.ts
  • src/manifest.json
  • src/offscreen.ts
  • src/offscreenAudioGraph.ts
  • src/utils/domHelpers.test.ts
  • src/utils/sanitize.test.ts
  • src/utils/sanitize.ts
  • tests/offscreenAudioGraph.test.ts

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@github-actions github-actions Bot added gssoc Official GSSoC contribution issue gssoc:approved GSSoC: PR approved and scored size/L type:feature Type: New Feature labels Jul 25, 2026
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github-actions Bot commented Jul 25, 2026

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👋 Thank you @Shan7Usmani for your contribution to Late-Meet!

✅ Verified: You are assigned to the linked issue #623.

Please review any automated suggestions or code review comments that may appear below! We will review your PR as soon as possible!

Please consider starring the repository ⭐ to show your support!

@github-actions github-actions Bot added type:docs Type: Documentation type:code Type: Code change type:test Type: Test files security-review Requires security review before merge labels Jul 25, 2026
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sonarqubecloud Bot commented Jul 25, 2026

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Quality Gate Passed Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

This was referenced Jul 28, 2026
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@shouri123 shouri123 Awaiting requested review from shouri123 shouri123 is a code owner

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gssoc:approved GSSoC: PR approved and scored gssoc Official GSSoC contribution issue security-review Requires security review before merge size/L type:code Type: Code change type:docs Type: Documentation type:feature Type: New Feature type:test Type: Test files

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feat: Implement adaptive Web Audio API noise gate for offscreen audio capture

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@Shan7Usmani @DeepeshKafalatiya