alm-busy-circuits/pip-lfo
Pip LFO
Compact 4HP all-analogue low frequency oscillator with wide frequency range, voltage control, bipolar and unipolar waveform outputs (triangle, saw, sine, square), reset input, and switchable VCO mode with V/Oct tracking.383
Capabilities 2
- LFOlfo
- All-analogue LFO with bipolar and unipolar triangle, saw, sine outputs and unipolar square output; frequency range approximately 0.01Hz to 30Hz with CV and reset inputs.383
- Voltage-Controlled Oscillatorvco
- VCO mode switches to audio-range operation, tracking 1V/oct over approximately 5 octaves into ultrasonic frequencies; hard sync via RESET input.383
Jacks 9 — 2 in / 7 out
| Name | Signal | Voltage | Description |
|---|---|---|---|
| Inputs (2) | |||
| FREQ CV | cv | — | CV input for LFO frequency control. In VCO mode tracks 1V/oct over approximately 5 octaves.383 |
| RESET | trigger | — | Resets all waveform cycles to start. In VCO mode acts as hard sync input.383 |
| Outputs (7) | |||
| Saw Bipolar Out | mixed | -5V to 5V | 383 |
| Saw Unipolar Out | mixed | 0V to 5V | 383 |
| Sine Bipolar Out | mixed | -5V to 5V | 383 |
| Sine Unipolar Out | mixed | 0V to 5V | 383 |
| Square Out | mixed | 0V to 8V | Unipolar square wave output only, oscillating 0–8V.383 |
| Triangle Bipolar Out | mixed | -5V to 5V | 383 |
| Triangle Unipolar Out | mixed | 0V to 5V | 383 |
Parameters 3
| Name | Type | Range | Behavior |
|---|---|---|---|
| FREQ | knob | 0.01Hz – 30Hz | Sets LFO frequency. Range is approximately 0.01Hz (90s cycle) to 30Hz (0.03s cycle) in LFO mode. In VCO mode, frequency jumps to audio range and tracks 1V/oct over roughly 5 octaves.383 |
| V/OCT TRIM | menu_setting | — | Rear-panel trimmer screw for fine-adjusting V/Oct frequency tracking in VCO mode. Calibrate by measuring pitch at 1V and 3V and adjusting until both are in tune 2 octaves apart.383 |
| VCO MODE | button | — | When engaged (indicated by LED), the LFO operates at audible frequency range, tracks 1V/oct over approximately 5 octaves, and goes into ultrasonic frequencies.383 |
Firmware history 0 versions
No firmware history recorded.
References 2
- [383]
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[384]
ALM Busy Circuits Pip LFO product pageproduct_page● verified 2026-05-15