What is Beatkerri 303?
Beatkerri 303 is an interactive, web-based step sequencer and drum machine that blends the classic TB-303 vibe with modern web technologies. It features three distinct game modes that challenge your rhythm, creativity, and musical intuition, all within a sleek, browser-friendly interface.
Built using React, TypeScript, and Tone.js, Beatkerri 303 delivers responsive performance and high-quality audio synthesis across all devices.
It was designed and developed by Aastha Kumari Karki (aka junkerri), a musician and web developer who wanted to build a fun, interactive rhythm game that also works as a tool for sketching beat ideas and sharing them with friends. Whether you're playing solo or jamming with others, Beatkerri 303 is your pocket-sized beat lab.
Game Modes
Beatdle Mode
Daily beat challenges inspired by Wordle. Listen to a target beat and recreate it within 3 attempts. Share your results with friends!
- • New beat every day
- • Streak tracking & statistics
- • Wordle-style sharing
- • Export as WAV/MIDI files
- • Score system
Challenge Mode
Progressive difficulty levels that unlock new instruments and stacking rules. Level up your beat-making skills!
- • Progressive difficulty
- • Unlock new instruments
- • Advanced stacking rules
- • Score tracking
Jam Mode
Free-form creative mode for making your own beats. Save, load, and export your creations as WAV or MIDI files!
- • Unlimited creativity
- • Save & load beats
- • WAV & MIDI export
- • Direct BPM input
Key Features
High-Quality Audio
Professional drum samples with real-time audio synthesis powered by Tone.js
Multiple Instruments
7 classic drum machine sounds: Kick, Snare, Hi-Hats, Toms, and Clap
Real-Time Feedback
Visual step sequencer with active step highlighting and instant audio playback
Export & Share
Export beats as WAV or MIDI files for use in DAWs, and share results with friends via social media
Latest Features
Streak Tracking
Track your daily Beatdle streaks, win rates, and perfect solve statistics. Compete with yourself and see your improvement over time!
Pattern Export
Export today's Beatdle pattern as high-quality WAV audio files or MIDI files for use in your favorite music production software.
Enhanced Sharing
Share your Beatdle results across multiple platforms including X (Twitter), Facebook, WhatsApp, Messages, and more with separate sharing options.
Achievement System
View detailed statistics including current streak, longest streak, perfect solve percentage, and overall win rate to track your progress.
Technical Details
Built With
- • Next.js 15 - React Framework
- • TypeScript - Type Safety
- • Tone.js - Audio Synthesis
- • Tailwind CSS - Styling
- • Lucide React - Icons
Audio Features
- • 44.1kHz Sample Rate
- • 16-bit PCM WAV Export
- • General MIDI Export
- • Real-time Audio Processing
- • Cross-browser Compatibility
- • Mobile Audio Support