tiptop-audio-hh909

Tiptop Audio HH909

Classic 909 hi-hat engine with modular voltage control

8 HP Eurorack module

The HATS909 is a Eurorack hi-hat synthesizer module that faithfully recreates the iconic Roland TR-909 hi-hat circuit using six mixed square wave oscillators fed through a bandpass filter and VCA. It offers independent decay controls for open and closed hi-hats, voltage-controlled tuning, and a switchable FM/AM CV input for dynamic timbral modulation. The module delivers the punchy, metallic character of classic drum machine hi-hats with added modular flexibility.

Features

  • Six mixed square wave oscillators recreating the TR-909 hi-hat circuit
  • Independent decay controls for open and closed hi-hat sounds
  • Separate gate inputs for open hi-hat and closed hi-hat triggering
  • Switchable source: 909 classic voicing or RAW oscillator sound
  • Switchable CV modulation: FM (frequency) or AM (amplitude)
  • CV IN attenuator for FM/AM modulation depth control
  • Voltage-controlled tuning via VC-TUNE input
  • Accent CV input for dynamic emphasis control
  • ACCENT knob for accent sensitivity/amount adjustment
  • Mixed mono output combining open and closed hi-hat signals
  • Status LED indicating trigger activity
  • Bandpass filter shaping the mixed oscillator output

Controls & Jacks (15)

  • CH DECAY— Controls the decay time of the closed hi-hat sound
  • CH GATE— Gate input to trigger the closed hi-hat sound
  • HATS OUT— Mixed audio output of both open and closed hi-hat sounds
  • LEVEL— Controls the overall output volume level
  • OH GATE— Gate input to trigger the open hi-hat sound
  • FM/AM— CV input for frequency or amplitude modulation (selected by FM/AM switch)
  • ACCENT IN— Accent CV input for dynamic emphasis
  • OH DECAY— Controls the decay time of the open hi-hat sound
  • CV IN— Attenuator knob for the FM/AM CV input jack
  • TUNE— Adjusts the pitch/tuning of the hi-hat sound
  • ACCENT— Controls the accent sensitivity/amount
  • FM/AM— Selects between frequency modulation (FM) and amplitude modulation (AM) for the CV input
  • VC-TUNE— CV input for voltage-controlled tuning
  • 909/RAW— Selects between the classic 909 hi-hat sound source and a raw oscillator sound source
  • Status— Indicates trigger activity

How-To Guides

  • Basic Closed Hi-Hat Setup
  • Open and Closed Hi-Hat Pattern
  • FM Pitch Modulation Sweep
  • AM Tremolo Hi-Hat
  • Accented Hi-Hat Pattern
  • Raw Industrial Hi-Hat
  • Pitched Hi-Hat Sequence
  • Envelope-Driven FM Accent Burst
  • Open Hi-Hat as Metallic Pad

Explore the interactive HH909 panel on BleepDex — tap any control to learn what it does.

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