Audio FX

About

Slowed + reverb, nightcore, lofi, 8D Audio and karaoke — apply pro audio effects to anything playing in your browser, including Spotify and Apple Music.

★ ONE-CLICK PRESETS
Slowed + Reverb · Nightcore · Lofi · Vaporwave · Phonk · Daycore · Sped Up · Concert Hall · Bathroom · Bedroom Pop · Underwater · Old Radio · Telephone · Bass Boosted · Crystal Clear · Boomy · Mellow · 432 Hz · 528 Hz · Anti-Nightcore · Slowed XL · 8D Chill · Karaoke Night

★ EVERY KNOB YOU NEED
• Speed 0.5× – 2× — smooth vinyl-style or pitch-locked
• Alternative tunings: 432, 440, 444, 528 Hz
• 3-band parametric EQ (bass, mid, treble)
• Reverb with dry/wet mix
• Volume boost up to 300% with built-in soft limiter
• 8D Audio — auto-panning spatial rotation
• Karaoke / vocal cut

★ WORKS EVERYWHERE
YouTube, SoundCloud, Bandcamp, podcasts, video lectures — anywhere a `<video>` or `<audio>` plays. For Spotify, Apple Music and Netflix, click the popup badge once to enable tab-capture mode.

★ AUDIO FX PRO — $3/MONTH
Unlock the full toolkit:
• Per-site profiles — different settings auto-applied per website
• Precision sliders — 10× finer steps for fine-tuning
• Cloud sync across all your Chrome installs
• Custom reverb upload — drop in any .wav or .mp3 impulse response
• Save your own presets with custom names
• Preset share codes — copy and paste settings between devices
• 20 extra presets (Vaporwave, Phonk, Underwater, Old Radio…)
• True pitch lock — keep voice pitch when slowing audio
• 8D Audio and Karaoke effects
• Export processed audio as .webm

★ PRIVACY
Everything processes locally on your device. No audio is uploaded, recorded, or sent anywhere unless you explicitly hit Export (which downloads straight to your machine). No analytics, no ads, no tracking.

★ TIPS
• Press Alt+A to open the popup
• Hover the ♪ logo to see your installed version
• On Spotify: open the popup → click the badge → "Enable tab capture"

Bug reports & feature requests: [email protected]