Guqin / Chinese seven-string classical zither multi-mic phase: pluck + silk/nylon vs body resonance, room/OH, and quiet fold
Close spots on the guqin silk or nylon strings and pluck hand feel huge in the booth and in cans. On phone speakers or YouTube mono fold, pluck attack, Mid, and quiet body resonance often thin or cancel against stereo OH and room paths that carry the same phrase a few milliseconds later. Quiet classical Chinese settings (voice, soft companion, room) stack the same problem, even when beds are quieter than pipa or guzheng denser ensembles. That is usually polarity and arrival time between pluck spots and shared beds, plus a stereo 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 beds before mono fold. Distinct from guzheng, pipa, gayageum, and koto: this page is about Chinese guqin / seven-string classical zither (and quiet classical companion beds) alone. Cross-links: guzheng, pipa, gayageum, koto, field, livestream.
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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 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 guqin / seven-string classical multi-mic phase failure sounds like
- Pluck attack huge in cans, thin on phones. Close silk/nylon or pluck spots share the same phrase a few ms apart from stereo OH or room.
- Quiet body resonance hollow on YouTube. Spot + stereo bed + room stack cancels Mid when the platform folds.
- Body secondary present in booth, gone on phone. Hard L/R across pluck and body resonance paths collapse on mono fold.
- Guqin hero vs soft classical companion / room bed fight. Quiet Chinese beds and guqin spots share mid energy without polarity hygiene (even when quieter than pipa/guzheng denser stacks).
- Fine in headphones, broken for livestream viewers. Same destinations as YouTube / social mono, OBS livestream, guzheng, pipa.
Fast mono audition (about 60 seconds)
- Solo the stream / mix bus (not only booth headphones). Flip a utility to mono.
- A/B guqin pluck/silk-nylon spots muted vs open under stereo OH and room. Note what disappears: pluck bite, Mid, body bloom, harmonic shimmer.
- Solo pairs: pluck vs body, guqin vs soft companion bed, spot vs OH.
- Check correlation on the delivery bus, then with the full quiet classical bed muted vs open.
Order of operations (before spectral phase rotation)
1. Polarity between pluck spots and shared OH / room / body
Flip pluck or silk/nylon spots vs stereo OH, or guqin vs companion bed, when body or Mid return immediately on a clear phrase. Guide: polarity vs phase. Cousins: guzheng, pipa, koto.
2. Small delay align secondary paths to the hero guqin image
OH, room, and body resonance secondary often arrive later than close pluck spots. A few samples of delay on the secondary often restores body better than EQ for "more guqin."
3. One hero guqin image to the stream or mix bus
Do not send every pluck, body, room, and OH all hot into the livestream or print. Pick a hero Mid-safe bed (often a focused stereo OH plus selective pluck spot), keep extras muted or low. Parallel stacks are classic thin-guqin on phone fold. Related: overhead & room.
4. Prefer hero pluck as the tone; quieter color spots
Secondary body closes should color proximity and resonance identity, 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 the classical zither bed.
5. Skip wideners and Haas on guqin beds before fold
Short-delay width and stereo imagers make booth headphones shimmer and phones hollow. Keep critical low-mid and quiet body centered for stream and print.
6. Only then audition residual L/R spectral fights
If a stereo 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 |
|---|---|---|
| Pluck/silk-nylon spots + stereo OH | Body / Mid cancel on stream | Polarity; delay secondary; quieter secondary |
| Guqin spot + body + room | Hollow pluck attack, thin resonance | Polarity + timing; hero Mid-safe path |
| Guqin + soft classical companion bed | Hero vs companion fight on phone | Polarity + delay; hero image |
| Stereo pair hard L/R across pluck/body | Huge in cans, thin on phone | Center critical lows; simplify width |
| Board / matrix → OBS / YouTube | Fine in booth, hollow for viewers | OBS livestream / YouTube mono |
Studio / livestream checklist (to send)
1. Label pluck vs body vs OH vs room vs companion bed
Name silk/nylon pluck spots, body resonance, soft classical companion, stereo OH, and room 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 quiet classical bed
Solo pluck body and Mid in mono. Then open resonance and harmonic shimmer in mono. Note fights between secondary color and hero bed.
3. Watch phone, YouTube, and social destinations
Most remote viewers hear mono or near-mono. Guides: YouTube / social mono, OBS livestream, TikTok / Reels / Shorts.
4. Re-check after stand / seating / angle moves
Instrument angle and mic height change distance and bleed. Flip polarity again after you move stands, change OH height, or re-seat the player.
When PHIXER helps
- The material is already stereo and must stay stereo (stereo OH, stereo room or board 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 Mid without wrecking the image.
- You are not using it to "fix" unaligned pluck+OH under room, or to replace a time-align edit on the matrix.
Decision table
| You notice… | First try | Why |
|---|---|---|
| Body thins when OH opens under pluck spots | Polarity; delay secondary; quieter secondary | Arrival-time fight |
| Guqin + companion harsh and hollow | Polarity; timing; hero Mid-safe path | Dual-path spot + companion |
| Fine in booth, thin on phone | Mono delivery bus; pull extras | Booth ≠ viewer fold |
| Stereo bed still cancels by band | PHIXER on that stereo bed | Residual spectral L/R fight |
| Mono guqin 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 image, or quieter secondary under pluck/OH.
- You want PHIXER to make the guqin louder, wider, or "more classical Chinese." 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 pluck spots vs OH/room/body → delay-align secondary → one hero image → quieter extras under hero → skip Haas/imagers → mono-check with full quiet classical bed → PHIXER only for leftover stereo cancellation on a stereo bed → fold again for stream / studio print.
Related guides
- Guzheng / Chinese zither multi-mic phase
- Pipa / Chinese lute multi-mic phase
- Gayageum / Korean zither multi-mic phase
- Koto / Japanese zither multi-mic phase
- Field recording / dual recorder outdoor phase
- Polarity vs phase rotation
- When not to use PHIXER
- YouTube / social mono fold checklist
- Twitch / OBS livestream mono fold
Watch
- PHIXER tutorial + how it sounds (walkthrough with audio examples)