AnyTool
Your files never leave your device. All processing happens locally in your browser.

How do I mix a multi-track podcast and remove silence online without uploading it?

Open AnyTool's Podcast Editor, drop in your host, guest and music tracks, and align them on a sync-accurate timeline with per-track volume, solo/mute, trim and waveforms. One click removes silences, normalizes to -16 LUFS (or -14 for Spotify), reduces noise and auto-ducks music under the voices, then you export MP3, M4A, OGG, FLAC or WAV. Everything runs in your browser with the Web Audio API and a self-hosted ffmpeg engine — no upload, no watermark, no caps, no CDN.

  • Sync-accurate multi-track timeline with per-track volume, solo/mute and trim
  • One-click remove-silence, EBU R128 normalize and noise reduction
  • Auto-duck music under voices; export MP3/M4A/OGG/FLAC/WAV
  • 100% in your browser — no upload, no watermark, no caps, no CDN

What is

Podcast editing / multi-track mixing

Podcast editing mixes multiple audio tracks (host, guests, music) on a shared timeline, then cleans them up by removing silence, reducing noise, normalizing loudness (e.g. -16 LUFS) and ducking music under speech. A client-side podcast editor does this in the browser with the Web Audio API for live mixing and ffmpeg for the final encode, without uploading the audio.

Audio Tools

Related terms

multi-trackremove silenceloudnormnoise reductionducking

How to Edit a Multi-Track Podcast

Mix, clean up and export a podcast in your browser.

60 secWeb browser
  1. 1

    Add tracks

    Drop in your host, guest and music files — they stay on your device.

  2. 2

    Mix and clean up

    Align tracks, set levels, then remove silence, reduce noise and normalize loudness.

  3. 3

    Export

    Download the mix as MP3, M4A, OGG, FLAC or WAV — nothing is uploaded.

Result: A finished podcast episode

Frequently Asked Questions

No — mixing and cleanup run entirely in your browser.

Nothing leaves your device, unlike desktop editing apps, Riverside, Podcastle, major desktop suites Podcast, Cleanvoice and Auphonic, which all upload to the cloud and add caps, watermarks, a jingle or per-hour credits.

Yes — one-click remove-silence plus EBU R128 normalize to -16 or -14 LUFS.

Silences are detected and cut locally, and the mix is normalized to a chosen target with per-track noise reduction — the headline features of paid tools, done on-device for free.

MP3, M4A, OGG, FLAC or WAV, with an optional target-size mode.

The mix is rendered and encoded by a self-hosted ffmpeg engine; WAV exports instantly with no ffmpeg load, and a target-MB option keeps the episode small for upload.

Detailed Explanation

Methodology

How the Podcast Editor Works

AnyTool mixes podcasts entirely in the browser with two engines. Each file is decoded once with the Web Audio API into a cached AudioBuffer and a peak waveform lane; a live preview schedules each track via AudioBufferSourceNode.start(when, offset) through per-track gain, EQ and compression, with solo/mute and an AnalyserNode-driven auto-duck that lowers music under the voice bus. Remove-silence detects low-RMS spans and rejoins the speech locally. The final mix renders in an OfflineAudioContext, then a self-hosted single-threaded ffmpeg.wasm engine (bundled core, no CDN) applies EBU R128 loudnorm (-16 podcast / -14 Spotify), per-track noise reduction (highpass + afftdn) and encodes MP3 (libmp3lame), M4A (AAC), OGG (libvorbis), FLAC or WAV; a WAV-only export skips ffmpeg for an instant result, and a target-MB mode plans the bitrate.

  • Runs client-side — all tracks are never uploaded
  • Sync-accurate multi-track timeline with per-track volume/solo/mute/trim
  • One-click remove-silence and EBU R128 normalize (-16/-14 LUFS)
  • Per-track noise reduction (afftdn) and auto-ducking
  • Self-hosted ffmpeg core (bundled) — no CDN
  • Export MP3/M4A/OGG/FLAC/WAV with a target-size option
Privacy & Security

Privacy vs Cloud Podcast Editors

desktop editing apps, Riverside, Podcastle, major desktop suites Podcast, Cleanvoice and Auphonic all upload your audio to the cloud and add caps, watermarks, a jingle or per-hour credits; AudioMass is the only other no-upload editor but has no multitrack, noise reduction or loudness normalize. AnyTool mixes locally, so nothing leaves the browser, with no length cap, watermark or sign-up — and it adds the full multitrack timeline, on-device noise reduction, remove-silence and LUFS normalize that AudioMass lacks.

Podcast editing: AnyTool vs typical tools
CapabilityAnyToolTypical tools
Data handlingIn your browserUsually uploaded
Multitrack mixingYes (synced)Often single-track
Remove silenceYes (one click)Sometimes (paid)
Noise reduction / normalizeOn-deviceOften gated
Caps / watermarkNoneCommon

AnyTool is a privacy-first client-side podcast editor — mixing and cleanup run locally and nothing is uploaded.