LofiDown : Slow Down & Speed Up

Slow down & speed up any song with lofi spring reverb, pitch shift, vinyl crackle & rain. Real-time audio FX for YouTube & music.

Turn any YouTube video, Spotify track, or browser audio into a relaxed, atmospheric lofi masterpiece in real time. LofiDown is a professional-grade browser audio processor designed for study sessions, late nights, or relaxing. Capture any tab's audio and customize your listening experience with real-time pitch shifting, analog slowdown, and vintage reverb effects. ★ KEY FEATURES: • Smooth Slowdown & Speed Control: Slow down or speed up your favorite tracks with vinyl-style pitch shifting (-12 to +12 semitones). • High-Quality Pitch Shifter: Change pitch independently from playback speed smoothly without metallic artifacts. • Premium Reverb Engine: Choose from Room, Spring, and Warehouse acoustic spaces with full dry/wet mix control. • Pure Bass Preservation: Reverb low-cut filtering keeps low-end 808 bass frequencies crisp, untouched, and deep. • Underwater Muffle Effect: Create fluid, deep underwater vibes with dynamic LFO-driven filter sweeps and volume ripples. • Vintage Radio EQ: Cut ultra-high and low frequencies for a classic nostalgic transistor radio playback vibe. • Ambient Sounds Mixer: Layer high-quality gentle rain loops or warm firewood crackling sounds with independent volume controls. • Stereo Widener: Expand the soundstage using the Haas effect for wide, modern headphone listening. • 808 Sub-Bass Visualizer: Watch sound react with real-time 3D graphics (Cozy Night starfield, Space Flight, and retro themes). • Private & Lightweight: Runs with zero latency natively in your browser and starts disabled by default for 0 background CPU usage.