Banjo / clawhammer / bluegrass banjo multi-mic phase: close vs head, pot, room, and OH fold
Close mics on clawhammer or bluegrass banjo feel bright and percussive in the booth and on stage wedges. On studio mono fold or livestream, body, roll, and attack often thin or cancel against head/pot, room, and OH paths that carry the same banjo a few milliseconds later. That is usually polarity and arrival time between close and head/room, plus a stereo banjo bed that was never folded before send. Fix polarity and small delays first. Frequency-aware phase repair belongs only after residual L/R fights remain on stereo banjo beds before mono fold. Distinct from a full bluegrass string-band stack: this page is about the banjo alone.
Download PHIXER free Learn more hub
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 banjo compressor, not a widener, and not a substitute for mic placement or mono audition of the stream or mix bus. Polarity and timing first; PHIXER after residual spectral fights.
What banjo / clawhammer phase failure sounds like
- Body and roll thin on livestream. Close head/pot and room/OH share the same energy a few ms apart.
- Attack huge in booth, hollow on phone. Hard L/R banjo layouts disappear when the platform folds.
- Head mic fights pot or rim close. Same content twice with different delay into the matrix.
- Studio or festival fold cancels midrange bark. Stereo bed never checked in mono before send.
- Fine in cans / wedges, broken for remote viewers. Same destinations as OBS livestream, live FOH / foldback, bluegrass string-band.
Fast mono audition (about 60 seconds)
- Solo the stream / mix bus (not only booth headphones). Flip a utility to mono.
- A/B close muted vs open under head/pot/room/OH. Note what disappears: body, roll, attack, midrange bark.
- Solo pairs: head vs pot, banjo vs room, stereo banjo bed vs mono fold.
- Check correlation on the delivery bus, then with banjo muted vs full.
Order of operations (before spectral phase rotation)
1. Polarity between close head/pot and room / OH
Flip close vs room, or head vs pot, when body or roll return immediately. Guide: polarity vs phase. Related: bluegrass string-band, acoustic guitar.
2. Small delay align close to the hero head / room image
Close pot or rim mics often arrive earlier than shared room or OH. A few samples of delay on the close (or nudge to the hero head image) often restores body better than any widener.
3. One hero banjo image to the stream or mix bus
Do not send head, pot, rim, room, and OH all hot into the livestream or print. Pick a hero image (often a focused head+pot blend), keep extras muted or low. Parallel stacks are classic hollow-roll on phone fold. Related: overhead & room.
4. Prefer hero head/pot as the body; quieter color close or room
Secondary closes should color attack and proximity, not replace the hero image for the stream mix. If every close sits at full level under a loud OH, mono fold almost always hollows roll. Pull extras first.
5. Skip wideners and Haas on banjo beds before fold
Short-delay width and stereo imagers make booth headphones huge and phones hollow. Keep critical low-mid and roll centered for stream and print.
6. Only then audition residual L/R spectral fights
If a stereo banjo bed 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, rotator bypassed vs engaged.
Path types and typical failure modes
| Path | Common mono failure | First fix |
|---|---|---|
| Head + pot / rim close | Body / roll cancel on stream | Polarity; delay close; quieter secondary |
| Banjo + room / OH | Attack disappears on phone | Polarity + delay; hero image |
| Close + stage bleed | Bark combs or thins | Bleed control; polarity; one hero |
| Stereo banjo pair hard L/R | Huge in cans, gone on phone | Center critical lows; simplify width |
| FOH / matrix → OBS / print | Fine in booth, hollow for viewers | OBS livestream / live FOH |
Studio / livestream checklist (to send)
1. Label head vs pot vs room vs OH paths
Name head, pot/rim, room, and OH so operators know what hits the livestream or print. Ambiguous stacks get left open and comb on fold.
2. Mono-check delivery bus alone, then with full banjo
Solo body and roll in mono. Then open attack and bark in mono. Note fights between secondary color and hero body.
3. Watch phone, social, and archival destinations
Most remote viewers hear mono or near-mono. Guides: live FOH, OBS livestream.
4. Optional null / mono workflow before show
Host-agnostic habit before you go live or print: master bus mono checklist.
When PHIXER helps
- The material is already stereo and must stay stereo (stereo banjo pair, stereo room print), not a mono close you fake-widened.
- Polarity, delay align, and hero-path levels 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 or roll without wrecking the image.
- You are not using it to "fix" unaligned head+pot under room, or to replace a time-align edit on the matrix.
Decision table
| You notice… | First try | Why |
|---|---|---|
| Body thins when pot opens under head | Polarity; delay secondary; quieter secondary | Arrival-time fight |
| Roll + room collapse on stream | Hero image; polarity; delay | Stacked identical content |
| Fine in booth, thin on phone | Mono delivery bus; pull extras | Booth ≠ viewer fold |
| Stereo banjo still cancels by band | PHIXER on that stereo bed | Residual spectral L/R fight |
| Mono banjo alone is dull | Tone / EQ / gain / mic choice | Not an L/R repair job |
When NOT to use PHIXER here
- You have not mono-auditioned the stream / mix bus yet.
- The fix is obviously polarity, delay, one hero banjo image, or quieter secondary under head/room.
- You want PHIXER to make the banjo louder, wider, or "more Scruggs." Wrong job.
- The path is mono and the print problem is balance or EQ.
- See also when not to use PHIXER.
Quick path: Solo delivery bus in mono → polarity head/pot vs room/OH → delay-align secondary → one hero banjo image → quieter extras under hero → skip Haas/imagers → mono-check with full banjo → PHIXER only for leftover stereo cancellation on a banjo bed → fold again for stream / studio print.
Watch
- PHIXER tutorial + how it sounds (walkthrough with audio examples)
Related guides
- Bluegrass / acoustic string-band multi-mic phase
- Acoustic guitar multi-mic phase
- Pedal steel / country steel multi-mic phase
- Ukulele / Hawaiian ensemble multi-mic phase
- Overhead & room mic phase
- Polarity vs phase rotation
- When not to use PHIXER
- Twitch / OBS livestream mono fold
- Live FOH / foldback / stream phase