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New TZFM Oscillator: ALM – TAZM-O

Right before their upcoming week-long pop-up shop, ALM / Busy Circuits just dropped a brand new TZFM (Through-Zero Frequency Modulation) oscillator: the TAZM-O.

Taking full advantage of the recently popular SSI2130 chip, ALM’s newest oscillator has some thoughtful design. Let’s take a look.


  • stable triangle core oscillator w/ TZFM and major wave shapes
  • continuous morphing of wave/pulse width shape into a main output
  • morphing CV input w/ attenuator (0-5V)
  • additional direct Sine, Sub-1, Sub-2, and Saw outputs
  • main output has a built-in VCA w/ level control
  • 3-octave range transpose CV input
  • FM Mod index w/ both manual and CV control
  • LFO mode w/ bipolar LED indicators
  • rear customization of Sub-2 wave/pulse

Jack I/O

  • Inputs
    • V/Oct
    • TZFM
    • FM Index
    • Octave Transpose (3 octaves)
    • Sync (Hard)
    • Shape (w/ attenuator)
    • VCA Level
  • Outputs
    • Sine
    • Sub-1
    • Sub-2
    • Saw
    • Shape (morphing)

Quick Links

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