Riverflux Audio
PHIXER - free stereo phase repair
Bring back what gets lost in mono. Adaptive phase correction for stereo bass, synths, samples, and mixes that collapse when summed.
Free Win · Mac · Linux VST3 · CLAP · AU
What it fixes
- Stereo phase cancellation that eats low end on phones and mono checks
- Hollow doubles, fighting layers, weak summed bass
- Without a blunt polarity flip - frequency-aware correction with transient protection
Controls
- Amount - strength of phase correction
- From / To - target a frequency range
- Visual feedback - watch the stereo signal as you adjust
Formats
- Windows - VST3, CLAP
- macOS - VST3, CLAP, AU (Apple Silicon + Intel; signed & notarized)
- Linux - VST3, CLAP
Watch
Tutorial + how it soundsWalkthrough with audio examples
Short intro (no commentary)Mute-friendly ad-style clip
Learn more
Why bass disappears in monoPhase cancellation explained - and how PHIXER helps.
Install guide (Win / Mac / Linux)VST3, CLAP, and AU paths for every major DAW.
FAQLicense, formats, mono checks, and support.
PHIXER vs time-align pluginsPhase rotation vs delay matching - when to use which.
When not to use PHIXERSkip phase rotation for mono sources, delay problems, or a simple polarity fix.
PHIXER vs stereo imagersWidth tools do not fix phase cancellation. When to image vs repair.
Mid/Side vs phase repairWhen M/S encoding is not the fix for mono collapse.
DI + mic phaseBass/guitar DI+mic fights before imagers
Overhead & room mic phaseWhy OH L/R + rooms cancel snare/kick body in mono
Vocal doubles phaseWhy stacked takes / ADT cancel chest body in mono
Guitar dual-cab phaseWhy two cabs / multi-mics cancel low end in mono
Snare top/bottom phaseWhy top & bottom mics cancel crack and body in mono
Sample stacks & layered one-shotsWhy stacked kicks/snares/808s cancel body in mono
Kick in/out mic phaseWhy beater + resonant cancel sub in mono
Piano stereo / spaced-pair phaseWhy L/R and lid+spot cancel body or hammer in mono
Parallel compression / bus phaseWhy dry + parallel cancels body in mono
Synth layers / unison phaseWhy stacked patches & unison cancel body in mono
Acoustic guitar multi-mic phaseWhy XY / spaced / body+neck cancel in mono
Correlation & phase metersWhat +1 / 0 / −1 means before you fix
Podcast dual-mic phaseWhy interview lav+boom / hard L/R cancel in mono
Bass DI + amp/cab phaseWhy DI + amp/cab cancels low end in mono
Choir & ensemble multi-mic phaseSpots vs mains, mono fold for streams
YouTube / social mono fold checklistPhone and platform fold before upload
Orchestral spot vs section phaseWhy spots + mains cancel body in mono
Live FOH / foldback / stream phaseWhy the matrix thins on fold
DAW null-test + mono-check workflowHost-agnostic habit before width
Film / TV LoRo fold-downTrailer beds & stems that hollow on fold
Haas effect vs phase repairWhen short-delay width hollows mono
Tom multi-mic / fill phaseClose toms vs OH hollow fills
Ping-pong delay throws vs monoEcho drama that combs on fold
Master bus mono checklistLast-pass fold before mastering
Stereo reverb / FX returns monoDry+wet fold without hollow chest
Sample library / Kontakt multi-micClose/room/OH without mono collapse
Club / DJ / PA mono foldKick and bass that survive the system
Stereo chorus / flanger / phaser monoMod FX that swirl in cans but hollow on fold
Broadcast / radio / TV monoVO+beds that survive air and downmix
Electric piano / Rhodes / Wurli phaseDI+mic and multi-mic without mono collapse
Car / Bluetooth / phone mono foldHuge in cans, hollow in the car or on a phone speaker
Field recording dual / lav+boom phaseOutdoor dual paths that survive docs and podcasts
Stem bus / stem delivery phaseWhen group stems fight the print on mono fold
Dialogue / ADR multi-take phaseProduction + ADR that hollows chest on TV mono fold
Brass / horn section multi-mic phaseSpots vs rooms that cancel body or bite in mono
Game audio / interactive mono foldPlatform, headphone, and stem downmix checks
String section / violin multi-mic phaseSpots vs tree/outriggers that cancel body in mono
Surround / 5.1 fold to stereo or monoDownmix cancellation; stems vs full mix
Remote podcast / Zoom / Riverside phaseDual-end stacks and stereo beds on phone fold
Woodwind / sax section multi-mic phaseSpots vs room/tree that cancel body or bite in mono
Twitch / OBS / Discord livestream monoPhone/BT fold for stream program bus
Foley / prop / SFX multi-mic phaseClose + room that cancel body or transient bite
Church / worship multi-mic + stream foldSanctuary close/OH/room vs phones, YouTube, Facebook Live
Percussion / hand drums multi-mic phaseConga/bongo/djembe/shaker close + OH that cancel in mono
Audiobook / narration / VO mono deliveryStereo room and dual-mic VO that thin on ACX/Audible
Pipe organ / church organ multi-mic phaseClose/pipe/spot vs room/OH that cancel body or pedal on mono fold
Wedding / event ceremony + DJ livestream monoLav/boom + band/DJ beds that thin on phones / FB Live / IG
TikTok / Reels / Shorts mono fold checklistShort-form vertical, phone speaker, single-bud BT
Theater / musical pit + stage multi-mic phasePit spots vs stage/FOH/foldback that cancel body on stream or archival mono
Conference / hybrid meeting mono foldLav+ceiling+room, dual-room guest, phone speaker checklist
PHIXER for educators / classroomMulti-mic student sessions, livestream classes, phone fold checks
Marimba / vibraphone / mallet multi-mic phaseClose bars vs OH/room that cancel tone on mono fold
Steelpan / steel drum multi-mic phaseClose pans vs OH/room that cancel body and shimmer on mono fold
Bluegrass / acoustic string-band multi-mic phaseBanjo/mandolin/fiddle/guitar/bass closes vs OH that cancel on mono fold
Sports / stadium broadcast mono foldField, crowd, announcer, FX beds that thin on TV/radio/PA/phone
Harmonica / blues harp multi-mic phaseClose harp vs amp/room/OH that cancel body and bite on mono fold
Accordion / bandoneon multi-mic phaseLeft/right manuals + mics vs room that cancel on mono fold
Marching band / outdoor parade mono foldField, pit, crowd, announce beds that thin on PA/broadcast/phone
Pedal steel / country steel multi-mic phaseClose steel vs room/amp/board that cancel body on mono fold
Ukulele / Hawaiian ensemble multi-mic phaseClose uke vs room/OH/ensemble that cancel on mono fold
Karaoke / bar open-mic / house PA monoVocal+backing+room that thin on phone/BT/PA
Lever / pedal concert harp multi-mic phaseClose strings vs soundboard/room/OH that cancel body on mono fold
Flamenco / classical nylon guitar multi-mic phaseClose body/neck vs room/OH that cancel golpe/nylon on mono fold
Vinyl transfer / needle-drop dual-path phaseDeck L/R vs secondary/room/ADC that cancel groove on mono fold
Banjo / clawhammer multi-mic phaseHead/pot vs room/OH that cancel roll on mono fold
Handpan / hang drum multi-mic phaseDing/rim vs room/OH that cancel tone on mono fold
Cassette / tape transfer dual-path phaseDeck L/R vs secondary/room/ADC that cancel body on mono fold
Mandolin / bouzouki / cittern multi-mic phaseNeck/body vs room/OH that cancel chop on mono fold
Ambisonic / binaural / immersive foldHOA/binaural vs stereo-mono that cancel Mid on fold
Spotify / streaming loudness + monoLUFS OK but phone/mono fold that hollows Mid
Dobro / resonator / lap-slide multi-mic phaseCone/body vs pickup/room/OH that cancel Mid on mono fold
Hammered dulcimer / mountain dulcimer / zither multi-micCourse/soundboard vs room/OH that cancel body on mono fold
Upright bass DI + mic + amp dual-path phaseDI/pickup vs bridge/body/amp that cancel fundamental on mono fold
Kalimba / mbira / thumb piano multi-mic phaseTines/soundboard vs room/OH that cancel Mid on phone/YouTube fold
Bagpipes / highland / uilleann pipes multi-mic phaseChanter vs drones/room/PA that cancel Mid on outdoor/parade fold
Chamber string quartet / small ensemble multi-mic phaseClose spots vs tree/room that cancel Mid on quartet fold
Gamelan / Indonesian gong-chime ensemble multi-mic phaseMetallophone/gong spots vs OH/room that cancel Mid on phone/YouTube fold
Kora / West African harp multi-mic phaseBridge/calabash vs pickup/room/OH that cancel Mid on mono fold
Modular / Eurorack multi-out stereo mono-fold phaseParallel outs/stereo modules vs FX returns that cancel Mid on fold
Sitar / Indian classical multi-mic phaseBridge/body vs tanpura/OH that cancel Mid on phone/YouTube fold
Oud / Middle Eastern lute multi-mic phaseBridge/soundboard vs room/OH that cancel Mid on phone/YouTube fold
Tabla / Indian percussion multi-mic phaseDayan/bayan spots vs OH/room that cancel Mid on phone/YouTube fold
Erhu / Chinese bowed multi-mic phaseBridge/body vs OH/room that cancel Mid on phone/YouTube fold
Shakuhachi / Japanese flute multi-mic phaseMouthpiece/body vs OH/room that cancel Mid on phone/YouTube fold
Charango / Andean ensemble multi-mic phaseCharango vs quena/panpipes/OH that cancel Mid on phone/YouTube fold
Shamisen / Japanese lute multi-mic phaseSkin/bridge vs OH/room that cancel Mid on phone/YouTube fold
Gayageum / Korean zither multi-mic phaseBridge/soundboard vs OH/room that cancel Mid on phone/YouTube fold
Didgeridoo / Aboriginal drone multi-mic phaseMouthpiece/bell vs OH/outdoor/PA that cancel Mid on phone/livestream fold
Duduk / Armenian reed multi-mic phaseClose reed vs room/OH/Caucasus beds that cancel Mid on phone/YouTube fold
Balalaika / Russian folk multi-mic phasePrima/tria vs orchestra OH that cancel Mid on phone/YouTube fold
Berimbau / Brazilian capoeira multi-mic phaseWire/gourd vs atabaque/pandeiro that cancel Mid on outdoor/phone fold
Guzheng / Chinese zither multi-mic phaseClose bridge/body vs room/OH that cancel Mid on phone/YouTube fold
Saz / baglama Anatolian multi-mic phaseClose neck/body vs room/OH that cancel Mid on phone/YouTube fold
Hurdy-gurdy / European folk multi-mic phaseMelody/drone vs room/OH that cancel Mid on phone/YouTube fold
Nyckelharpa / Swedish folk multi-mic phaseKeys/bow vs room/OH that cancel Mid on phone/YouTube fold
Qanun / Middle Eastern zither multi-mic phaseCourses/bridge vs room/OH that cancel Mid on phone/YouTube fold
Bodhrán / Irish frame drum multi-mic phaseSkin/rim vs room/OH that cancel Mid on phone/YouTube fold
Pipa / Chinese lute multi-mic phasePluck/bridge vs room/OH that cancel Mid on phone/YouTube fold
Cimbalom / Hungarian folk multi-mic phaseCourses/hammers vs room/OH that cancel Mid on phone/YouTube fold
Koto / Japanese zither multi-mic phaseBridges/strings vs room/OH that cancel Mid on phone/YouTube fold
Hardanger fiddle / Norwegian folk multi-mic phaseBridge/bow vs understring body/room/OH that cancel Mid on phone/YouTube fold
Morin khuur / Mongolian horsehead fiddle multi-mic phaseBow/bridge vs body/khoomei beds that cancel Mid on phone/YouTube fold
Guqin / Chinese seven-string classical multi-mic phaseSilk/nylon pluck vs body/room/OH that cancel Mid on phone/YouTube fold
Uilleann pipes / Irish multi-mic phaseChanter vs regulators/drones/bag/room/OH that cancel Mid on phone/YouTube fold
Yangqin / Chinese hammered dulcimer multi-mic phaseCourses/hammers vs soundboard/room/OH that cancel Mid on phone/YouTube fold
Santur / Persian hammered dulcimer multi-mic phaseCourses/mezrabs vs soundboard/room/OH that cancel Mid on phone/YouTube fold
Kantele / Finnish folk multi-mic phaseString spots vs soundboard/body/OH that cancel Mid on phone/YouTube fold
Theremin / electronic air-instrument phaseClose+room dual path and stereo width that cancel Mid on mono fold
Steel tongue drum / tank drum multi-mic phaseTop vs body vs room that cancel Mid on phone/YouTube fold
Ableton Live mono phaseUtility mono, Stereo Width, Returns, Max vs residual spectral repair
REAPER null test + phase alignInvert polarity, align, null honestly, then residual spectral repair
FL Studio mono phaseFruity Stereo Shaper, mono check, Mixer routing tips
Logic Pro AU phaseGain polarity, Phase Tick, stereo to mono fold on bounce
Bitwig Studio mono phaseStereo width, Note FX, device-chain mono fold vs residual spectral repair
Studio One mono phaseMix Engine FX, Transform to mono, polarity, AU/VST3 tips
Cubase mono phaseControl Room mono, polarity, VST3 phase tips
Pro Tools mono phaseInvert Phase, mono button, AU/AAX vs VST3/CLAP/AU notes
Tracktion Waveform mono phaseMixer mono fold, polarity, plugin tips vs residual spectral repair
Reason Studios mono phaseRack/mix mono fold, polarity, Combinator tips
Ardour mono phaseMonitor fold, polarity, Linux VST3/LV2/CLAP tips
Harrison Mixbus mono phaseMixer fold, polarity, console-style Linux tips
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Share kitReady-to-copy blurbs for X, IG, Discord, forums
Watch / mono demoYouTube embeds + bass cancel / Mid hollow / phone fold
Free polarity tools vs time-align vs PHIXERHonest categories: when to use which