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Javelin

Javelin module front panel: a black 6HP Eurorack panel with four large knobs (Attack, Decay, Sustain, Release), EXPO, LOOP, LEVEL, MODE and RANGE buttons with status LEDs, and nine input/output jacks across three rows at the bottom.

Expressive Envelope and Amplitude Controller

1Introduction

Javelin is the envelope that WMD always needed to make, it just took years of figuring out how to properly weaponize the necessities. Taking technology developed for the Multimode Envelope, and perfecting the digital control was just the beginning. With that very powerful core, we took inspiration from percussion and bass line synthesizers and designed a stacking accent feature into the envelope itself, helping breathe life and drama into your patches. All ranges are intentional and immediately musical. The controls are intuitive and inspiring. Javelin's engineering is the collision of passion and perfection.

2Front Panel Overview

Diagram of Javelin's front panel from top to bottom: a JAVELIN label, EXPO and LOOP buttons with LEDs beside the ATTACK knob, ENV and ACC status LEDs to the right, a DECAY knob with MODE button, ACC and ENV LEDs with a LEVEL button beside the SUSTAIN knob and a RANGE button, a RELEASE knob, then three rows of jacks: AMP CV / ATTACK / RELEASE, IN / RESET / ACCENT, and OUT / GATE / ENV, with a WMD logo at the bottom.
Javelin front panel layout.

2.1Controls

  1. ATTACK: Potentiometer and associated jack control the attack time of the envelope.
  2. DECAY: Potentiometer controls the decay time of the envelope. Holding MODE and pressing LOOP will enable CV control of decay time through the RELEASE jack.
  3. SUSTAIN: Sets the sustain level of the envelope.
  4. RELEASE: Potentiometer and associated jack control the release time of the envelope.
  5. EXPO (LED): Indicates 3 levels of exponential. Off produces a linear envelope. Dim produces a slightly exponential envelope. Lit produces a very exponential envelope. Hold LOOP to cycle through these settings.
  6. LOOP: Quickly pressing this button will toggle looping on the envelope. The sustain stage remains active in loop mode.
  7. LEVEL: Quickly pressing this button cycles through three attenuation levels of the envelope output. The envelope will have the most attenuation when the LED is the dimmest. Holding this button will slowly cycle through three levels of accent. This value determines the max level an accented envelope can reach.
  8. MODE: Pressing this button toggles between two states. When the LED is lit the envelope will always complete every stage regardless of gate length. If the LED is not lit, the envelope will only continue through its stages as long as the GATE input is high. If it becomes low, the envelope will jump to the release stage.
  9. RANGE: Pressing this button cycles through three envelope time ranges. A dim LED indicates the fastest envelope ranges.
  10. STATUS LEDs (ENV, ACC): ENV LED shows the pre-level voltage of the envelope. ACC LED shows the current accent level.

2.2Jacks

  1. AMP CV, IN, OUT: These three jacks are for the integrated VCA. IN and OUT are the signal path. The envelope is normalled to AMP CV. The LED in crosshairs at the top of this column shows the AMP CV level.
  2. GATE: Gate input for the envelope.
  3. RESET: Reset forces the envelope back to 0V. The envelope will restart its attack stage if GATE is high when this event occurs, otherwise it will rest at 0V.
  4. ACCENT (CV): Putting a positive signal into this jack creates an accent by allowing the envelope to attack to a higher voltage. A higher voltage at this CV will correspond to a more dramatic effect. Use a sequencer to jump between different accent amounts for even more dynamics. Holding MODE and pressing LEVEL will toggle “accent stacking.” This feature slews the accent response while it's enabled. The ACC LEVEL LED will blink 3 times when this feature is enabled. Once when disabled.

3Specifications

Dimensions:

  • Width: 6HP
  • Depth (with cables): 38mm

Power:

  • +12V: 93mA
  • -12V: 65mA

VCA:

  • 100k ohm input/CV impedance
  • 1k ohm output impedance
  • Linear curve. 0V = off, 5V = unity
  • 22Vpp range

Envelope:

  • Digitally controlled analog core
  • Gate/Reset: 100k ohm impedance. 2V Schmitt Trigger
  • 15us Latency
  • Attack/Release CV: 68k ohm impedance
  • Accent CV: 100k ohm impedance. 0-5V
  • Envelope Levels: 3V, 5V, 7V
  • Accent Levels: +32%, +42%, +48%
  • Max Level + Max Accent: 6V, 9.8V, 11.7V (clipped)
  • 1k ohm output impedance

Segment Ranges (Linear):

  • Fast: 350us to 1.15s
  • Medium: 700us to 5.5s
  • Slow: 1ms to 23s
  • Slow with 5V CV: 240ms to 88min

Memory:

  • Front panel settings save to EEPROM: 1 save / minute