SyncMix - YouTube MUSIC Crossfade

Crossfader for YouTube Music. Blends tracks between two tabs using a custom queue, with optional beatmatch backend.

SyncMix – Automated Crossfader & Queue Mix for YouTube Music Say goodbye to silent gaps between songs. SyncMix is a browser extension that brings smooth, automated crossfading, intelligent timing control, and intuitive queue management to YouTube Music — turning your favorite playlists into a continuous, seamless DJ-like mix. 🎶 Build your mix queue, your way • One-Click Queueing: Add tracks one by one using the "+ ADD" tag next to any song, or import entire albums and playlists in an instant with "Add All to SyncMix". • Intuitive Drag & Drop: Reorder tracks freely in your queue by grabbing the dedicated grip handle (⋮⋮) with smooth visual insertion guides. • One-Click "Send to TOP" (⏫): Want to play a song next without dragging? Hit the Send to TOP button to immediately bump it to the front of the line. ⏱️ Set how every track in the queue starts & plays • Global IN Start Time: Define a default IN point that applies to all incoming tracks (e.g., skip 15s intros automatically). • Per-Track Fine Tuning: Customize independent IN start points and relative PLAY TIME limits for any song using step buttons (±1s / ±10s) or direct text input. • Quick Reset (↺): Easily revert any individual track back to global default timing at any time. 🎚️ Smooth, automatic crossfading • Smart Transitions: Crossfades trigger automatically when a track reaches the end of its set PLAY TIME (or its natural end). • Manual Crossfade: Trigger a transition at any moment with the instant CROSSFADE button. • 4 Transition Curves: Choose between Equal Power (Sin/Cos), Club Blend, Linear, or Natural (S-Curve) to match your vibe. 🎧 Dual-deck live view & Headphone CUE • Two-Deck Monitor: Track NOW PLAYING and UP NEXT simultaneously with live playhead position and timing limits. • Headphone CUE (3rd Tab): Open a third YouTube Music tab and route it to your headphones in Audio Routing settings to silently audition upcoming tracks while your main speakers keep the party going uninterrupted. ⚡ Take it to the next level: Optional SyncMix BPM Engine (Free (for now) Local Backend) Want professional DJ beatmatching and visual waveforms? Download and run the lightweight, free SyncMix Backend on your PC (Turn ON "BPM Analysis (Backend)" in Settings): • 🎛️ Pioneer CDJ / Rekordbox HiDPI Waveforms: Renders crystal-clear, dynamic audio waveforms on 1440p and 4K displays with a glowing Pioneer Playhead Needle. • 🎯 Zero-Latency Visual Beat Sync: Continuous Time-Slice RMS analysis aligns visual drops and bass kicks to the exact sub-millisecond you hear them. • 🥁 Automatic Beat Phase Alignment: Detects BPM of both tracks and synchronizes their beat grids at the transition point — kicks blend on-beat without altering playback pitch. • ⚡ Lightning-Fast Local JIT Warmup: Processes tracks in just 2-3 seconds entirely on your local machine. *(Note: The SyncMix browser extension works standalone for crossfading and queue management out of the box. Waveform beatmaps and BPM alignment activate automatically when the local backend is running).* 🔒 100% Local & Privacy-Friendly Everything runs directly in your browser and on your local machine. No audio is ever sent to external cloud servers, no account registration, and no tracking.