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Ammo 400R Modulation Oscillators

Audio/CV Modulation

Jiggery-Pokery Sound

  • • Four Oscillator LFO Generator and Monosynth
  • • Over 100 Waveform Shapes
  • • Programmable Routing

Video clips

Audio examples

Arm your rack and take Reason modulation to the next level with Ammo's 136 basic and complex waveforms.

With four audio oscillators that can be freely mixed and routed, and a massive frequency range, Ammo features an all-audio rate internal oscillator path suitable for both audio and CV output.

Available in three variants, the single oscillator 100LA, 12 oscillator 1200BR, and the the 400R available here, which includes the full four oscillator Ammo section, a six-stage envelope and a Re-ARM internal routing device.

Product details

User Guide Download Ammo User Guide

Designed and built by Reason users with over ten years experience in the software, Ammo provides a set of unique modulation tools, including features never seen before in Reason, including multiple oscillator sync modes, and dual-mode/dual-slope lag controls to independently smooth abrupt voltage changes of the up and down waveform slopes.

Ammo 400R features:

  • Four audio oscillators
  • 135 preset waveforms provide easy-to-use, predictable but complex modulation curves, and a random stepped wave
  • Massive native frequency range from 0.001 Hz to 8,372 Hz, plus 31 tempo sync speeds from 32/1 to 1/128T
  • Select "always on" oscillator output, or retriggered keyboard control, including a built-in 6-stage amp envelope
  • 360° phase adjustment
  • Invertible waveform depth control
  • Set portamento time per oscillator with legato - play Ammo like a Theremin!
  • One-shot mode plays a selected waveform once per gate
  • Apply a single "Master" rate (Oscillator A) to control rates all other "Slave" oscillators (B, C and D)
  • Choose from three oscillator synchronisation modes, Hard, Soft Phase or Soft Overlap, to sync slave oscillators to the master oscillator

Voltage Processing Matrix

  • Add or subtract all four oscillators with each other, individually per oscillator output
  • Lag controls: for the first time in Reason use separate lag control (slew limit) for the up and/or down stages of the waveform, and choose whether the slew limiting should be linear or logarithmic
  • Lag controls can be used as low-pass filters
  • Fine-tune the output level with a master channel output adjustment
  • Crossfade an oscillator with summed inputs from other oscillators, or select to sum by itself
  • Positive and negative waveform value indicators for each output
  • Four CV rate outputs per channel
  • One audio output per channel

Re-ARM: Remote Analogue Routing Matrix

  • Quickly set up performance controllers for Pitch Wheel, Mod Wheel, Aftertouch and Expression to major Ammo targets
  • Use the Internal Routing Matrix to direct up to four sources to two targets each. Includes all the major targets plus deeper control possibilities
  • Audio rate FM and AM available from the next adjacent oscillator
  • Adjust the sensitivity of Re-ARM sources to rate modulation - a 7th, one or two octaves, or full range (26 octaves)!
  • Switch Ammo VPM lag adjustment from linear to logarithmic mode
  • An "extra" set of four CV inputs and outputs are available

Designed by Jiggery-Pokery Sound, Coded by Pitchblende Ltd

All demo tracks feature the Ammo 400R.



  • Codebase updated to SDK2.5 (Reason 9+ only)
  • ReARM modulation bus now uses fully sub-grouped custom display pop-up menus for vastly improved and faster programming
  • Fixed issue with one-shot outputting incorrect value at slow rates
  • Amended several waveform graphics to better reflect final value for one-shot hold (at default 0° Phase)
  • 400R now defaults to a basic LFO setup


  • One-shot will now correctly reset waveform if envelope has long release time


  • Vastly improved startup performance should clear “Song too slow” errors on songfile loading.
  • Oscillator Envelopes are now turned on by default to prevent patch browse noises that were caused by the free-running oscillators


  • Fixed rare property notification issue at startup
  • Fixed crash when connecting C CV Out to C Env I


  • Adjusted waveforms 42–45 to a more useful exponential half-range
  • Fixed sample error on waveforms 77–78
  • Disabled playhead sync when using One-Shot Mode, where it is not required
  • Improved behaviour of waveform 136 (random) in Tempo Sync Range: set Phase to 360° and use Rate control only. Note that there are still two samples per cycle, so set the Rate to half what you require for a single sample value
  • New patches


  • Added Semitone and Cents ranges to Oscillators A–D for quick precision tuning at audio rates
  • Improved inverting knob behaviour
  • Fixed synchronisation to playhead in tempo sync range



Released: 2018-02-22
Version: 2.0.0