Fancyyyyy K-Accumulator
Advanced complex oscillator with phase modulation, wave-shaping, and self-modulating topology
32 HP Eurorack module
The K-Accumulator by Fancyyyyy (designed with Graham Wakefield) is a 32HP stereo complex oscillator that pushes phase modulation and wave-shaping synthesis into unexplored territory. It combines a Carrier/Modulator oscillator core, a Universal Function Generator (UFG), and a Delta-Sigma pattern generator into a cross-normalized, self-modulating topology. The module can smoothly morph between super-positions of an eight-node matrix, progressively remapping panel controls to waveshaping destinations. It supports quantization to Just Intonation or Equal Tempered scales, audio-rate external pitch tracking, and a unique Sync Damping algorithm that smoothly transitions between pulsar synthesis, windowed sync, and formant synthesis. With 23 audio and control patch points, there are no menus, no shift functions, and no hidden modes — every parameter has immediate tactile control.
Features
- Complex oscillator with carrier/modulator architecture
- Advanced phase modulation with through-zero stability
- 8-node waveshaping morph matrix
- Universal Function Generator (UFG) — dual-use LFO/envelope/audio oscillator
- Delta-Sigma pattern generator for built-in sequencing
- Sync Damping algorithm — smooth transition between sync, pulsar, and formant synthesis
- Quantization to Just Intonation or Equal Temperament
- Audio-rate external pitch tracking
- Cross-normalized self-modulating topology
- Harmonic stretching and frequency shifting
- Four distinct synthesis outputs: FMNT, FBPM2, 2OP2, Mod
- 23 audio and control patch points
Controls & Jacks (60)
- UFG Output
- UFG LED
- UFG Loop
- Skew
- Trig
- UFG Time -/+
- Time
- 1V CV In
- Pattern -/+
- UFG Shape
- UFG 1V/Oct
- Type Out
- Type
- TZFM
- UFG Trig
- Delta-Sigma Out
- Length
- Root CV In
- Pattern
- Smooth
- Chance
- Clock
- Scale
- Tet/JI
- Root
- CRS/FIN/OCT
- UFG/OSC Select
- Root -/+
- Root 1V/Oct
- Mod Out
- Harmonic
- Order
- Detune
- UFG/OSC LED
- Mod UFG/OSC
- OSC UFG/OSC
- Detune -/+
- HMX/TZ
- Ext. In
- Sync/Track
- Damped/Pulsar
- Freq.
- TZPM
- Stretch
- Shift
- Stretch -/+
- Shift -/+
- 1V/TZ
- Shift CV In
- FMNT Out
- FBPM2 Out
- Asym
- 2OP2
- Morph
- XPM2
- Depth
- OSC Shape
- Depth -/+
- Shape -/+
- Depth CV In
How-To Guides
- Basic FM Bell
- Pulsar Synthesis Drone
- Generative Sequence
- Evolving Morph Pad
Explore the interactive K-Accumulator panel on BleepDex — tap any control to learn what it does.