Local-first audio review

Mixmarks

Attach one WAV, write precise revision notes, and export a portable review ledger. Audio and project data stay in this browser.

Private by construction

Your WAV is processed locally. This page has no audio-upload, account, usage measurement, or remote review workflow. It accepts integer PCM RIFF/WAVE files up to 536,870,912 bytes (512 MiB).

Choose a WAV or open a review project to begin.

01

Attach local files

Selection does not upload or modify either file. Unsupported audio fails visibly.

Audio source

Choose or drop exactly one supported WAV.

Portable notes

Open a Mixmarks review JSON before or after the WAV.

Local inspection

  1. Check extension and byte size
  2. Read and validate PCM/WAVE structure
  3. Measure frames and build waveform
  4. Compute full-file SHA-256 fingerprint
  5. Verify native local playback

02

Listen and navigate

Playback never starts automatically. The measured frame duration defines note bounds.

00:00.000 00:00.000

Waveform keyboard: Home and End jump to bounds; arrows move 1 second; Shift + arrow moves 5 seconds.

03

Declare review context

These fields describe authored context. They are not independent proof of review or approval.

Revision details

04

Author timecoded notes

Use Add note or press M outside a form field. Notes are exported in stable time order.

Filter note view

    05

    Save local evidence

    Downloads contain declared metadata and measured identity, never audio bytes or playback state.

    AUTHORED NOTES - REVIEW AND REVISION STATUS UNVERIFIED

    This ledger preserves authored comments and valid timestamps for this WAV. It does not prove any person listened to, agreed to, implemented, checked, or approved a change.