timo-rozendal-filler

Timo Rozendal Filler

Intelligent drum fill and variation engine for Eurorack

14 HP Eurorack module

Filler is a Eurorack drum variation module that listens to incoming drum triggers, learns the rhythm over 2-3 bars, and then plays fills, variations, and transformations on command, all synchronized to an external clock. It features two independent processing layers: a fill layer that temporarily replaces the drum pattern for one bar, and a drummer layer that continuously transforms the passing pattern in real time, giving electronic drum patterns a more dynamic and human character.

Features

  • 6 trigger inputs (BD, SN, CH, OH, P1, P2) with pattern learning over 2-3 bars
  • 7 trigger outputs including automatic cymbal/crash output (CY) on fill end
  • 333 built-in fill patterns organized across 41 genre-grouped banks
  • 6 fill modes: Mute, Built In, Automatch, Variation, Euclidean, Roll
  • 8 drummer variation modes for continuous real-time pattern transformation
  • Markov chain machine learning drummer mode with exponential decay model
  • Steve Reich-style Phase-Cascade drummer mode
  • CV output with configurable attack, release, and curve synchronized to fills
  • CV input routable to Fill Param knob or Drummer knob via settings
  • Direct mode for immediate mid-bar fill triggering
  • Deferred mode for bar-aligned fill triggering with armed state indicator
  • External clock input at 1 pulse per 16th note (PPQN=4)

Controls & Jacks (25)

  • CH Input— Closed hi-hat trigger input
  • CV Input— Control voltage input (0-5V), routable to Fill Param or Drummer knob
  • Encoder— Rotary encoder with push function. Controls different parameters depending on active OLED page: fill mode/bank/random range (F page), drumme
  • OH Output— Open hi-hat trigger output
  • BD Output— Bass drum trigger output
  • BD Input— Bass drum trigger input
  • Drummer— Controls intensity of drummer variation layer. Has 10% dead zone at bottom (pure passthrough). Turning clockwise increases drummer effect. C
  • CH Output— Closed hi-hat trigger output
  • CV Output— Control voltage envelope output (0-6.5V), synchronized to fills
  • Direct Mode— Toggles between Direct mode ON (fill starts immediately at current position) and OFF (fill waits for next bar boundary). LED lights yellow w
  • SN Output— Snare trigger output
  • P2 Input— Percussion 2 trigger input
  • P1 Output— Percussion 1 trigger output
  • SN Input— Snare trigger input
  • Clock Input— Clock input (1 pulse per 16th note)
  • P1 Input— Percussion 1 trigger input
  • OH Input— Open hi-hat trigger input
  • P2 Output— Percussion 2 trigger output
  • Reset Input— Reset to beat one input
  • Fill Input— Alternative fill trigger input
  • CY Output— Cymbal/crash trigger output (auto-fires at fill end)
  • Fill Param— Controls the character of fills. Function depends on current fill mode. CV input can be routed to this knob.
  • Reset— Manually resets Filler to step 1 (beat one) for rhythm synchronization.
  • Page— Cycles through the four OLED display pages: F (fill), D (drummer), CV (envelope), + (settings).
  • Fill— Triggers a fill pattern. LED inside indicates state: off (idle), solid (fill active), pulsing (fill armed for next bar). Button has integrat

How-To Guides

  • First Fill: Basic Setup and Sync
  • Saving Settings (Auto-Save)
  • Firmware Update via USB
  • Fill-Triggered Filter Sweep
  • Context-Aware Live Fills
  • Self-Evolving Drum Pattern with Markov
  • Steve Reich Phase Displacement Drums
  • Spontaneous Mid-Bar Fill Performance
  • Voltage-Controlled Drummer Intensity
  • Euclidean Fill Density Transitions
  • Snare Ghost Note and Negative Space Groove

Explore the interactive Filler panel on BleepDex — tap any control to learn what it does.

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