The Bubblesound uLFO is a highly versatile voltage-controlled low-frequency oscillator that extends far beyond a traditional LFO, offering wide-ranging modulation and audio-rate capabilities. With a frequency range spanning from extremely slow cycles of up to 60 minutes to high-speed oscillation reaching approximately 3.6 kHz, it can function as both a modulation source and an audio-rate oscillator.
The module provides seven simultaneous waveform outputs, including saw, ramp, triangle, pulse, square (sync output), sine, and a unique shaped sine wave. The shaped sine morphs between exponential forms and a clean sine response, offering rich and dynamic modulation possibilities.
The pulse output features continuously variable pulse width control (0–100%), adjustable manually or via CV with attenuation, enabling PWM-style movement and complex rhythmic modulation. Two frequency modulation inputs with attenuators allow for linear or exponential FM routing, giving deep control over modulation behavior and timbre.
Additional functionality includes 1V/oct tracking over approximately 4–5 octaves, making the uLFO capable of acting as a secondary oscillator when needed. A sync input allows external synchronization for rhythmic or phase-locked modulation setups. The module also exhibits intentional amplitude variation at extreme settings, which can be creatively exploited, including pseudo-VCA behavior using the sine modulation input.
Features
• Wide-range voltage-controlled LFO with audio-rate capability
• Frequency range from ~60-minute cycles to ~3.6 kHz
• Seven simultaneous waveform outputs
• Saw, ramp, triangle, pulse, square (sync), sine, and shaped sine outputs
• Unique shaped sine wave with morphing exponential characteristics
• Pulse width modulation (0–100%) with CV control and attenuation
• Two FM inputs with attenuators and selectable linear/exponential response
• 1V/oct tracking over 4–5 octaves
• Sync input for external synchronization
• Capable of pseudo-VCA behavior via sine output modulation
Specifications
• Product: Bubblesound uLFO
• Type: Voltage-controlled LFO / oscillator
• Frequency Range: ~60 minutes to ~3.6 kHz
• Waveforms: 7 simultaneous outputs
• CV Inputs: FM (2), PWM, sync, 1V/oct
• Width: 16HP
• Depth: 60 mm
• Power Consumption: +100 mA / -100 mA
Included
• Bubblesound uLFO module