Trilling Passaggio: a digital VCO with alternating cycle-length waveforms and MIDI support

January 4, 2026 Synth Anatomy Eurorack, Hardware, News 0

Trilling Passaggio is a new digital VCO for Eurorack with alternating cycle-length waveforms and MIDI support.

Let’s start the Eurorack year 2026. Trilling Synths is a young company based in the Netherlands that launched on Kickstarter recently.

With the new Passaggio, Trilling unveiled a compact oscillator featuring a new concept.

Trilling Passaggio

Passaggio is a new 9HP original digital VCO for Eurorack. Trilling Passaggio features all the classic waveforms you expect from a classic. These are placed on a 2D plane or in a simpler matrix, which offers advantages over a conventional oscillator design.

Instead of just selecting these, you can also seamlessly morph between them using the skew and morph parameters on the front panel.

Skew selects the waveform column, while the morph parameter blends between the waveforms. You can do this manually or with bipolar CV inputs with built-in attenuverters.

A key feature of the Passaggio oscillator is its unique alternating-cycle-length patterns/waveforms. It has a dedicated control that creates clean yet harmonically rich distortion by varying individual cycle lengths while keeping the sum of multiple cycles stable.

Manual or automated alternating is possible via the CV input and built-in attenuverter. Alongside this, it features a fine-tune section, a hard-sync input, and a 1V/oct pitch input.

Neat, MIDI support is also onboard via a dedicated extension module, which will be available soon.