Pre-Count - Loop Practice Tool for YouTube

Pre-Count is a loop practice tool for YouTube. Pick any part of a video, loop it, slow it down, change the key, split the song into stems, and start every take on a metronome count-in — all from one panel you can open inside the YouTube page, in Chrome's side panel, or as a popup. Loop four bars at 60% speed until the passage is clean. Mute the bass stem and play that line yourself. Drop the key a whole step to match a down-tuned guitar. And instead of scrambling to catch the first beat each time the loop comes back around, get a "1, 2, 3, 4" count-in so you are already in time. Made for musicians, dancers, and music students who practice with YouTube backing tracks, play-alongs, and MRs. Everything runs in your browser — no account, no uploads, no data collected. At a glance: bar-accurate looping, playback speed 1%-400%, pitch shift in semitones, stem separation (drums, bass, other, vocals) with a mixer, automatic BPM and start-point detection, a metronome with pre-count, a measure timeline with bookmarks, and per-video settings that sync across your devices. 🔁 Loop Practice: Bar-Accurate Loops: Drag on the measure timeline or set a bar count, and the loop repeats exactly on the beat — not a rough drag on YouTube's scrubber. Count-In On Loop: Add a count-in before every repeat (Off / 2 Beats / 1 Bar / 2 & 4) so you come in on time instead of chasing the first beat. Precision Mode: Loads the whole song into memory and plays it from an audio buffer instead of the video element, giving sample-accurate loops, count-ins, and start points. Skip Sections: Mark the parts you do not want to practice and let playback jump over them. 🐢 Speed & Pitch: Playback Speed Control: Adjust YouTube's playback speed from 1% to 400% directly from the extension. The metronome automatically syncs to the adjusted tempo, and Precision Mode keeps the tone clean when you slow down. Pitch Control: Shift the audio up or down in semitones without changing the speed — match a down-tuned guitar, or transpose the song into an easier key. 🎚️ Stem Separation & Mixer: Splits the song into drums, bass, other, and vocals on your own machine, then lets you mute or solo each one from a mixer panel over the video — practice along with the drums only, or mute the bass and play that part yourself. 🥁 Metronome & Pre-Count: Custom Pre-Count: Set BPM and beats per bar, then hear a precise count-in before the video plays, so you start on time every time. Rhythm Modes: 10+ subdivision patterns — Every Beat, Strong/Weak Beats, 8th, 16th, Triplet, Swing, and more. Metronome Control: Independent sound/visual toggles and separate volume control. 📊 Tempo, Timeline & Sections: Automatic Tempo Detection: Analyzes the whole song offline to find its BPM and start point, and offers alternative results to pick from when the first answer is not the one you wanted. Full-Song Waveform Picker: Displays the whole song's waveform with an overview strip, zoom, and a bar/beat grid. Drag or scroll to fine-tune the tempo and start point, move section boundaries, and audition the result. Multi-Tempo & Sections: Handle songs with tempo changes by adding multiple BPM markers, or let detection split them for you. Manage sections via a list view with quick navigation. Songs within a Video (Beta): Split a medley, live set, or practice compilation into songs. Each song keeps its own tempo, loop, and practice settings, and detection, the waveform picker, Precision Mode, and stems work on just that song. Adjust a song's start and end in 0.01s steps and test-play each edge. Measure Timeline & Bookmarks: Name the spots you keep returning to and jump between them with a shortcut. Real-time Overlay: Shows the current measure, effective BPM, and the previous/next bookmark by name while practicing. 💾 Presets, Sync & Privacy: Setting Presets: Save a named set of practice settings (loop, speed, pitch, metronome, stems) per video and switch back to it in one click. Auto-Save, Sync & Export: Settings are automatically saved per video and mirror across your devices through your Chrome account. Export/import as JSON for backup and sharing. 🪟 Open It Your Way: Open Pre-Count as a panel inside the YouTube page, in Chrome's side panel, or as the classic popup — pick one from the ☰ menu. The panel and side panel stay with their tab when you switch tabs and come back, and stay out of the way on other tabs. No need to pin the icon: right-click any page and choose "Open Pre-Count", or click the small tab on the right edge of videos you've saved. 🎹 Recommended For: • Musicians practicing with backing tracks or MR • Guitar, piano, drum, and bass players learning a part by ear • Dancers who need a precise cue to start choreography • Music students counting measures while reading scores 🔒 Privacy: This extension runs entirely in your browser. No personal data is collected or transmitted. Version 3.1.0 Updates: - Open Your Way: Open Pre-Count as a panel inside the YouTube page, in Chrome's side panel, or as the classic popup. The panel and side panel stay with their tab when you switch away and come back. Switch anytime from the ☰ menu - Open Without Pinning: Right-click any page and choose "Open Pre-Count". Saved videos also show a small tab on the right edge that opens the panel, and you can hide it - Songs within a Video (Beta): Split a medley, live set, or practice compilation into songs. Each song keeps its own tempo, loop, and practice settings, and detection, the waveform picker, Precision Mode, and stems work on just that song - Minor Improvements & Bug Fixes - Saved list groups songs under their video - Fine-tune a song's start and end by 0.01s and test-play each edge - Seeking outside a song while not practicing switches to the song (or whole video) at that point - Settings and Help moved into the ☰ menu Version 3.0.2 Updates: - Detection Result Tabs: Keep every detection result as a tab, edit any of them, and apply the one that fits - Live G…