Auto-balance podcast stems with Dugan-style automixing
Auto-balance multi-speaker podcast stems with Dugan-style gain-sharing automixing and sub-sample phase alignment. 100% private in-browser Web Audio.
Free Multi-Track Podcast Automixer & Phase Aligner
Free FlagshipNo speaker stems loaded yet.
Upload 2 to 4 separate microphone audio tracks (Host, Guest 1, Guest 2) or load the sample interview demo.
100% browser-local processing · No files uploaded to any server
Dugan-style speech automixing for multi-mic recordings
Auto-balance 2–4 speaker podcast stems with real-time gain sharing and sub-sample phase correlation.
Dugan-Style Gain Sharing
Dynamically distributes master gain across active speakers, preventing ambient noise buildup when multiple participants talk simultaneously.
Sub-Sample Phase Correlation
Aligns cross-bleed timing across adjacent microphones within microsecond precision to eliminate comb filtering and hollow hollow dialogue.
Cross-Bleed Ducking
Smoothly attenuates quiet microphone channels by -14 dB when another host is speaking, keeping the overall mix tight, clean, and professional.
Integrated -16 LUFS Master
Renders the final automixed stereo track to calibrated -16 LUFS with True-Peak brickwall limiting for direct Spotify and Apple Podcasts upload.
AutoSilenceCut Automixer vs. Paid Multitrack Plugins
Compare browser-local gain-sharing automixing against expensive DAW plugins and subscription cloud services.
| Capability | AutoSilenceCut Automixer | AutoPod / Auphonic Multitrack |
|---|---|---|
| Subscription Cost | 100% Free · No Quotas | $29/month or metered credits |
| Phase Delay Alignment | Automatic Pearson NCC | Manual track nudge in NLE |
| Microphone Bleed Ducking | Dynamic Dugan-Style Gain Sharing | Harsh gating / Manual cutting |
| Data Privacy | 100% Local (Zero uploads) | Cloud upload required (Auphonic) |
Engineering guides & deep-dive workflows
Explore the acoustic principles, gain-sharing automix formulas, and phase alignment techniques behind this tool.
How to Automix Multi-Speaker Podcast Stems with Dugan-Style Gain Sharing
Mastering multi-microphone dialogue: sub-sample Pearson phase delay alignment, dynamic Dugan-style gain sharing, and broadcast LUFS matching in the browser.
How to Edit a Podcast: A Practical Spoken-Word Workflow From Raw Audio to Final Review
The end-to-end podcast post-production checklist: raw backup, silence triage, noise notch, saliva de-clicking, breath softening, and loudness matching.
How to Fix Phase Cancellation When Converting Stereo Audio to Mono
Why summing out-of-phase stereo tracks destroys vocal presence. Diagnose comb filtering, apply 180° polarity inversion (Ø), and isolate dominant channels.
Frequently asked questions
Common questions on multi-track podcast stem automixing and phase alignment.
How does Dugan-style gain-sharing automixing work in multi-speaker podcasts?+
Gain-sharing automixing (the method pioneered by Dan Dugan) dynamically shares total system gain among active microphones mathematically (gk = Lk / sum Lj). When the host speaks, the guest microphone is smoothly attenuated by up to 12dB to eliminate room echo and acoustic bleed. When both speak simultaneously, gain is balanced proportionately without clipping or speech cutoff.
What is sub-sample phase alignment and why does it matter?+
When two or more microphones record in the same acoustic space, sound travel time creates phase delay. Summing these signals together produces comb filtering (a thin, hollow, boxy sound). AutoSilenceCut calculates Pearson cross-correlation across stems to detect and shift sample delays, locking waveforms into phase coherence.
Are any audio stems uploaded to cloud servers?+
No. All stem decoding, Pearson cross-correlation, Dugan gain distribution, and WAV master rendering take place 100% locally in your browser memory via the Web Audio API. No audio ever touches an external server.
How many podcast stems can I mix simultaneously?+
The studio supports 2 to 4 simultaneous microphone tracks (Host, Co-Host, Guest 1, Guest 2) with real-time per-channel mute, solo, and Dugan automix weight controls.
What loudness standard is applied to the final mix?+
The master mix is normalized to -16 LUFS integrated loudness with an inter-sample True-Peak limiter ceiling of -1.0 dBFS, fully compliant with Apple Podcasts and Spotify distribution guidelines.
Complementary Voice & Audio Tools
Combine multi-track automixing with voice enhancement, noise cleanup, and loudness matching.
Spectral Voice Cleaner & De-Reverb
Clean room echo and background noise with client-side spectral DSP.
Multi-Track Audio Joiner
Merge and crossfade multiple audio files into a continuous track.
Audio Volume Normalizer
Balance loudness to -16 LUFS podcast and -14 LUFS YouTube broadcast standards.
Air-Gapped Batch Processor
Process 50+ files in parallel with zero cloud uploads and compliance CSV audit logs.
Background Noise Remover
Filter out 80Hz rumble, electrical hum, and desk vibrations during pauses.
Studio Voice Enhancer
6-stage broadcast voice polish with dynamic de-essing, tube EQ, and True-Peak limiting.