PHIXER for Field Recording: dual recorders, lav+boom outdoors, and honest mono for docs
Outdoor shoots stack risk: two recorders with slightly different clocks, a lav on talent and a boom a meter away, stereo mics fighting wind and reflections. In headphones the ambience feels rich. On a doc fold, podcast mono, or phone playback, dialogue chest thins and stereo beds cancel. Sync and polarity come first. Free phase-repair helps after residual L/R fights remain on a stereo print. It is not a dual-recorder sync tool, and it does not replace a true mono listen on the cut.
Download PHIXER free YouTube tutorial
PHIXER is free stereo phase-repair (VST3/CLAP/AU · Win/Mac/Linux) from Riverflux Audio. Frequency-aware phase rotation for leftover L/R fights on stereo material. It is not a slate/sync tool, not a lav time-aligner by itself, not a wind filter, and not a stereo widener. Use it after hygiene, when residual spectral cancellation remains on a stereo bed you must keep stereo.
Three field-recording failure modes this page covers
- Dual recorder / lav+boom outdoor phase. Fine in cans; thin on the doc or podcast fold. Full checklist: Field recording / dual recorder / lav+boom outdoor phase.
- Live FOH / stream cousin. Open mics and dual-path kits that cancel on matrix mono. Cousin guide: PHIXER for Live FOH.
- Film / LoRo cousin. Stereo beds that hollow on TV and web fold-down. Cousin guide: PHIXER for Film / TV.
Fast outdoor mono audition (about 60 seconds)
- Sum L+R on the program / doc / podcast bus (or monitor controller mono). Listen to dialogue chest, lav body, and stereo ambience tails.
- A/B stereo vs mono. Note what disappears: vocal mid, boom low-mid, stereo bed width that was actually cancellation.
- Mute lav or boom briefly. Note which path thins the fold. Mute recorder A vs B after sync.
- Confirm on a phone speaker or single earbud path, then again after any bus FX / limiter pass, not only before cleanup.
Honest order of fixes (before spectral phase rotation)
1. True mono listen on the cut / podcast bus
Hard L+R sum or monitor mono. Habit: field dual-phase checklist and mono check workflow.
2. Sync dual recorders before tone fights
Slate, jam sync, or align clocks. Spectral rotation will not invent missing sync. Dual-recorder drift is timing first.
3. Polarity if a path flips
Lav vs boom, inverted recorder channel, mid-side decode mistakes. Flip Ø when body returns. Guide: polarity vs phase.
4. Timing / delay-align before spectral tools
Boom farther than lav needs a few ms, not a widener. Prefer one hero path for critical dialogue lows.
5. Only then audition residual L/R spectral fights
If a stereo ambience bed or printed dual-path stem must stay stereo and fold still hollows a band after the steps above, gentle frequency-aware phase rotation can help. Prove it with mono A/B. Watch the YouTube tutorial and the mono demo.
Field / outdoor path types
| Setup | Common mono failure | First fix |
|---|---|---|
| Lav + boom outdoors | Chest dips when both open | Polarity; align; prefer hero path |
| Dual recorder A/B | Phasey after rough sync | True sync / clock align first |
| Stereo XY / ORTF ambience | Bed hollows on doc fold | Mono listen; see field checklist |
| Wind + handling noise | Masks the real cancel | Clean wind path; then re-check mono |
| Doc dump into podcast mono | Fine in cans, thin on phone | Phone speaker check before delivery |
| FOH / stream cousin dump | Open-mic dual path cancel | Live FOH guide |
Live FOH cousin (short version)
- Open mics, wedges, and dual-path kits create the same mono-fold shape as lav+boom outdoors.
- Matrix / stream mono checks catch what headphones hide, same as a phone check on a doc cut.
- Polarity and timing still come first. Spectral tools after residual L/R fights only.
- Full write-up: PHIXER for Live FOH.
When free PHIXER belongs in a field kit
- The material is already stereo and must stay stereo (ambience bed, stereo print), not a mono dialogue dump you fake-widened.
- Sync, polarity, and mono listen are cleaned up, but fold still hollows a band of the spectrum.
- You can A/B mono with the plugin bypassed and hear clearer body without wrecking the image.
- You are building a mono habit on the cut, not using PHIXER to paper over unsynced recorders.
- Budget is zero: free download on Gumroad (Win/Mac/Linux · VST3/CLAP/AU).
Decision table
| You notice… | First try | Why |
|---|---|---|
| Lav+boom thins when mono | Mute one path; polarity | Anti-correlated dual path |
| Dual recorder sounds phasey | Sync / align clocks | Timing before spectral tools |
| Stereo ambience still cancels by band | PHIXER on that stereo print | Residual spectral L/R fight |
| Wind dominates the boom | Wind path / mic choice | Not an L/R repair job first |
| Live matrix hollows the same way | Live FOH checklist | Same mono-fold physics |
| You want more loudness | Limiter / gain staging | PHIXER is not a loudness tool |
When NOT to use PHIXER here
- You have not mono-auditioned the cut / podcast bus or a phone speaker yet.
- The fix is obviously sync, quieter boom wind path, polarity, or a few ms of delay.
- You want PHIXER to fix unsynced dual recorders, replace a time-aligner, or widen a mono dialogue dump. Wrong job.
- The path is mono and the print problem is level or tone.
- Full list: when not to use PHIXER.
Quick path: Cut mono listen → sync dual recorders → mute fighting lav or boom → polarity if a path flips → align a few ms → mono again after bus FX → phone check → PHIXER only for leftover stereo cancellation on a bed you must keep stereo → confirm again in mono. Cousins: Live FOH · Film / TV · core field: lilac-globe-27ey.