Hack Your KORG Volca FM2 and Drum! Synth Journal

Aug 27, 2026
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KORG Volca FM2 and Drum teaser

Fun hacks to get more out of the KORG Volca FM2 and Drum, a new “auto-dynamic” Joranologue filter module, and more.

Made With Best Practice Rithmatic for KORG Volca FM2

The KORG Volca FM2 is a great little synth. Like a budget Yamaha DX7, it gives you six voices of polyphony to play those classic 1980s FM sounds. New one-man company Made With Best Practice offers an FM librarian called Rithmatic that’s designed to work with the KORG Volca FM2.

Made With Best Practice Rithmatic
Made With Best Practice Rithmatic · Source: Made With Best Practice

There are already quite a few editors and librarians out there for the KORG Volca FM2, but Rithmatic looks worth a look. It not only sends DX7 patches to your Volca, it can act as a depository for your DX7 patches, including single voices, 32-voice bulk banks, .SYX and .SYS files, and even ZIP archives. You can tag and search for patches, save them to one of 64 memory slots, even build your own patches and play them via the onboard FM engine

Best of all, Rithmatic is free. It’s available for MacOS, iPhone, iPad and Android.

KORG Volca FM2 is available from our affiliate partners Thomann* and Sweetwater*.

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Korg Volca FM2
Korg Volca FM2
Customer rating:
(40)
Korg Volca FM 2 Synthesizer with Sequencer
Korg Volca FM 2 Synthesizer with Sequencer

hj-oja hj Firmware KORG Volca Drum Custom Firmware 

My favorite of the KORG Volca series has to be the Drum. With its DSP and physical modeling touches, it doesn’t sound like anything else out there. Being a KORG Volca, though, it doesn’t offer the most complex sequencer. Developer hj-oja has set out to fix that.

Korg Volca Drum
Korg Volca Drum · Source: Korg

Called hj Firmware, their new (and very unofficial) firmware beefs up the KORG Volca Drum’s sequencing capabilities and general operation in some very cool ways. 

Here’s what it does:

Visit hj-oja’s GitHub page (link below) to access the update and find out how to install it.

KORG Volca Drum is available from our affiliate partners Thomann* and Sweetwater*.

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Korg Volca Drum
Korg Volca Drum
Customer rating:
(163)
Korg Volca Drum Physical Modeling Drum Synthesizer
Korg Volca Drum Physical Modeling Drum Synthesizer

Ian Dixon Korg DW-8000 Editor 

We are now firmly in the age of vibe coding. While on the one hand this is resulting in a deluge of plugins that all look the same, it’s also giving us some interesting browser-based instruments and editors. One guy making editors for vintage synths (I assume he’s getting assistance from AI, although I could be wrong) is Ian Dixon, who currently offers free editor/librarians for the Kawai K1, KORG MS2000 and one of my personal favorite synths, the KORG DW-8000.

The DW-8000 Editor & Librarian lets you edit the synth in real-time from a browser interface, with displays of waveform shape on the two oscillators, a visual graphic for the filter and amplitude envelopes, sliders for all of the digital delay parameters, and more. You can also write patterns to memory, import and export patches, save libraries, and perform other librarian functions.

Looks like Ian has a Yamaha DX100 one coming soon. I wonder if that will work with my DX21.

3DSage Sage Sequencer

3DSage is a 3D printing genius (can I use that word, genius? I think it applies) who made a wearable chiptune synth with a sequencer. How cool is that? Done entirely DIY, his Sage Sequencer features a basic square wave synth and a 16-step sequencer in a 4 x 4 grid that’s giving Nanoloop vibes.

I love how the housing is transparent in that Y2K style, and that he can wear it like a watch.

The Sage Sequencer is so far one of a kind, but apparently he might make some to sell so check out the comments section in the YouTube video (above) to express interest.

Joranologue Flow 3

I feel like it’s been a while since we featured some Eurorack in Synth Journal. Let’s rectify that right now with Flow 3, the latest module from Joranologue. The 6 HP Flow 3 offers a new variation on the classic state variable filter, with simultaneous 2-pole lowpass, bandpass and highpass outputs with smooth resonance that you can use as a sine/cosine oscillator. It really does sound delicious.

Joranologue Flow 3
Joranologue Flow 3 · Source: Joranologue

The company describes Flow 3 as an auto-dynamic filter, and this is where it gets interesting. Sort of like an auto-wah, Flow 3 can modulate itself via a combined decay generator/envelope follower circuit that controls the filter frequency over an adjustable range. This makes it great for kick drums and auto-wah effects. You can also use it as a spectrum splitter.

Joranologue Flow 3 is available now from Thomann*.

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Joranalogue Audio Design Flow 3
Joranalogue Audio Design Flow 3 No customer rating available yet

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