JDrummer

JDrummer is a powerful, open-source drum machine VST3 plugin built with the JUCE framework.

JDrummer features SoundFont-based drum kits, a comprehensive groove library with tempo-synced playback, a composition tool, and an intelligent Groove Matcher that analyzes audio to find matching drum patterns.

Features

Drum Pads

• 16-pad drum grid with velocity-sensitive playback.
• Multiple SoundFont kits - Ships with 29 drum kits including:
  • Standard acoustic kits (Standard, Room Drums, Power Drums, Jazz Drums).
  • Electronic kits (808, Electronic Drums, Dance Drums, House Kit).
  • Specialty kits (Orchestral Percussion, Brush Drums, NIN Drumkit).
• Per-pad controls:
  • Individual volume adjustment (0-100%).
  • Pan control (left/right).
  • Solo and mute options.
• Dynamic kit loading - Add your own .sf2 SoundFont files to expand your library.

Grooves Browser

• Extensive groove library organized by category:
  • Basic Beats.
  • Break Beats.
  • Buildups.
  • Double Bass Beats.
  • Fills.
  • Half Time Beats.
  • OffBeats.
  • Swing Beats.
  • Tom Beats.
• Tempo-synced playback - Grooves automatically sync to your DAW's tempo.
• Preview functionality - Audition grooves before adding them to your project.
• Drag and drop - Drag any groove directly into your DAW as a MIDI clip.
• Bar selection - Choose how many bars of a groove to use (1-16 bars).

Composer

• Build complete drum parts by combining multiple grooves.
• Visual timeline showing your arrangement.
• Reorder and remove items from your composition.
• Export as MIDI - Drag your entire composition to the DAW.
• Loop playback for previewing your arrangement.

Groove Matcher

An intelligent feature inspired by professional drum software that helps you find the perfect groove for your music:

• Audio analysis - Drop any audio file (WAV, MP3, FLAC, OGG, AIFF) to analyze its rhythm.
• BPM detection - Automatically detects tempo using the miniBPM library.
• Smart filename parsing - Extracts BPM from filenames (e.g., "beat_120BPM.wav").
• Pattern matching - Analyzes rhythm patterns and finds matching grooves from your library.
• Similarity scoring - Shows match percentage for each suggested groove.
• Preview with audio - Play back the matched groove alongside your original audio.
• Automatic composition - Best match is automatically added to the composer.
• Seamless workflow - Found the perfect match? Drag it straight to your DAW.