Welcome to our support center.

What is a "four dimensional" oscillator?

Four Seas' engine arranges wavetables in 3D cubes (X, Y, and Z axes, up to 12 banks at a time). The "fourth dimension" comes from its intelligent spread controls, which send sound across four related outputs. This provides patching flexibility and timbral variety.

How is Four Seas different from other wavetable oscillators?

Most wavetable oscillators give you one or two outputs and a way to move through waveforms. Four Seas gives you four related outputs at once, each positioned in a 3D wavetable space. Also different is what it doesn't do; no screens, presets, menus, or Street Fighter button combos to remember; what you see is what you get (and you get a lot, in our honest opinion).

What are the four outputs, are they independent?

They're related, not fully independent. All four draw from the same wavetable engine, but each sits in a different position in the 3D wavetable space, set by the spread algorithms. Think of them as four perspectives on the same sound; harmonically connected, yet distinct.

Can I load my own wavetables?

Yes. You can load custom wavetables via the SD card slot. We support standard formats, and you can find specific file requirements here.

What format do the wavetable files need to be in?

Four Seas reads standard WAV files from the SD card. Each WAV file contains one "page" of the wavetable cube — a grid of 64 single-cycle waveforms (8 columns by 8 rows), concatenated end to end.

Specs:

• Format: WAV, 16-bit signed PCM, mono, 44.1 kHz
• Samples per waveform: 2048
• Waveforms per file: 64 (8 × 8 grid, stored sequentially)
• Total samples per file: 131,072 (64 × 2048)
• Files per bank: 8 (named 1.wav through 8.wav, one per Z-axis position)
• Maximum banks: 12

SD card folder structure:

/1/1.wav ... /1/8.wav   ← Bank 1, pages 1–8
/2/1.wav ... /2/8.wav   ← Bank 2, pages 1–8
...
/12/1.wav ... /12/8.wav ← Bank 12, pages 1–8

Within each file, the 64 waveforms map to the X and Y axes of the wavetable cube: waveform 0 is position (X=0, Y=0), waveform 1 is (X=0, Y=1), waveform 8 is (X=1, Y=0), and so on. The file number (1–8) determines the Z-axis position.

You can create wavetables using our wave creator tool (coming soon), convert them from other formats like Serum, or build your own. As long as they follow the structure above, Four Seas will read them.

Is the firmware open source?

Yes. We believe in a modular community built on curiosity and openness. Four Seas firmware is fully open source. Anyone is welcome to explore, modify, and build on it.

Where is Four Seas made?

In Helsinki, Finland. Four Seas carries both the Made in Finland and Design from Finland certifications.

Where does the name "Ferry Island Modular" come from?

We're based in Lauttasaari, an island neighborhood in Helsinki. "Lauttasaari" literally means "ferry island" in Finnish, and it felt like the natural name for a company rooted here.

Where can I buy your modules?

Our modules are available at a few trusted shops we love. You can find our distributors here.

How do I update the firmware?

If a firmware update is available for your module, instructions and files will be provided on the product page.

I'm a retailer. How can I stock your modules?

Please contact us. We'd love to hear from you.

I'm a journalist or content creator. Can I review your module?

Yes. For press inquiries, demo units, or collaborations, please reach out via our contact form.