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LFOs

Firmware for SQ-64 (Korg)

From-scratch replacement firmware that turns the SQ-64 into four tempo-synced LFOs with six waveforms, CV and gate outputs, MIDI CC streams, gating step sequences and MIDI clock following. Tested only in an emulator.

by Aleph Void LLC

ActiveSource: openMIT

Brick risk. Flashing this carries a known, documented risk of damaging the device.

Distribution
Prebuilt image you flash yourself
Requires stock
Stock update mode (2.0x) for the first install
Source
github.com https://github.com/aleph-void/Korg-SQ-64-Custom-Firmware-LFOs
Homepage
sq64.alephvoid.com https://sq64.alephvoid.com

Description

Four LFOs with sine, triangle, rise, fall, square and sample-and-hold shapes and sixteen synced rates from 8 bars to 1/32, including dotted and triplet values, each with depth, phase offset and its own MIDI CC on its own channel. LFOs A to C can drive their mod CV, pitch CV and gate jacks; LFO D pulses trigger jack 1 once per cycle. All phases come from one 24 PPQN transport that follows incoming MIDI clock automatically and falls back to the internal 20 to 300 BPM clock. Each pattern carries a 64-step sequence that gates the LFO, editable per bar with loop and swing. Shares the Euclidean firmware's updater, storage map and install procedure. Written from an independent specification with no Korg code; the authors state it is not certified safe on hardware.

Install notes

Load the prebuilt .vsb from the registry in the browser emulator, or build it with make and validate it (make check, make test). To flash, take a full backup under stock firmware, hold GLOBAL + PATTERN at power-on and send the .vsb with the Aleph Void updater web app. The image reports version 1.0, older than stock 2.0x, so the host tool's downgrade option is needed; whether the stock updater accepts it is unverified. Projects share the stock saved-project slots and overwrite them. Return to stock by sending Korg's official .VSB through this firmware's updater.

Version history

LFOs version history
VersionDateNotes
main @ f4805402026-10-12Commit pinned by the firmware registry.

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