Polyend Medusa firmware

Polyend discontinued Released 6 Aug 2021
synth
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Final firmware: 4.0.1

Polyend has stopped releasing firmware updates for this device.

What's new in 4.0.1

New Features: 6-voice 3-operator digital FM synth engine; reworked pitch bend and glide; improved Channel per Voice mode; MIDI Program Change; LFO sync with MIDI Clock; per-preset Skip muted voices option. Fixes: digital clicking at note start; analog AMP envelope release handling; long note releases no longer cut short; mono-mode second-note volume restore; voice priority (Next/First) behavior; auto-calibration with smart timer; responsiveness under heavy USB MIDI load; all-notes-off / all-sound-off / CC64 sustain pedal support; held-notes on root/layout/scale changes no longer hang; MIDI aftertouch hanging notes in Mono; amp envelope screen updates in poly modes; Grid-mode sequence priority fixes.

You can still add it to your rig to keep an inventory and track its used market price.

Last checked 7 Aug 2026

Download 4.0.1 from Polyendopens in a new tab — polyend.com

How to update the Polyend Medusa

Download the .psy firmware file from polyend.com/downloads/medusa-downloads/. Copy it to a microSD card, insert into Medusa, hold LOAD + RECORD + PERFORM while powering on to enter bootloader mode, then select the firmware from the Config menu to flash.

What you need

Polyend Tool (macOS/Windows) via USB, file .hex — the software Polyend uses to load firmware onto the Polyend Medusa. Download links below.

Just for reference. For complete and up-to-date instructions, always refer to the manufacturer's official firmware page.

Drivers & software for the Polyend Medusa

The Polyend Medusa is updated with Polyend Tool (macOS/Windows) via USB, file .hex, published by Polyend.

Download Polyend Tool (macOS/Windows) via USB, file .hex from Polyendopens in a new tab — polyend.com

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Polyend Medusa firmware update history

Changelogs summarised from the manufacturer's release notes.

4.0.1

Release notes for this version are listed above.

Release notesopens in a new tab — polyend.com

Tracked in 2 rigs on FW//RADAR.

Polyend Medusa manual & official pages

Polyend Medusa firmware FAQ

What is the latest firmware for the Polyend Medusa?

The latest firmware for the Polyend Medusa is version 4.0.1. FW//RADAR last checked Polyend's official page on 7 Aug 2026.

How do I update the Polyend Medusa?

Download the .psy firmware file from polyend.com/downloads/medusa-downloads/. Copy it to a microSD card, insert into Medusa, hold LOAD + RECORD + PERFORM while powering on to enter bootloader mode, then select the firmware from the Config menu to flash. Full instructions on Polyend's official firmware page.

What software do I need to update the Polyend Medusa?

You need Polyend Tool (macOS/Windows) via USB, file .hex, available from Polyend's support site.

Where can I download Polyend Medusa firmware and drivers?

Directly from Polyend's official firmware page — FW//RADAR links to the source and never hosts firmware files. Official firmware page →

Where can I find the Polyend Medusa manual?

The official Polyend user manual is a PDF hosted on polyend.com. Polyend Medusa user manual (PDF) →

Is the Polyend Medusa still receiving firmware updates?

Polyend has stopped releasing firmware for the Polyend Medusa. The last version is 4.0.1.

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