Polyphony in Eurorack requires a dedicated signal path per voice and is expensive, space-consuming, and complex

In a conventional synthesizer, polyphony is built-in. In Eurorack, each simultaneous voice requires its own oscillator, filter, VCA, and envelope — plus a polyphonic MIDI interface module to distribute note data across voices. A 4-voice polyphonic patch therefore costs roughly four times a monophonic one in both modules and rack space. This is a fundamental structural difference from software synthesis and many hardware synths. Most Eurorack users work monophonically or design generative patches that sound harmonic without traditional polyphony.

Examples

Wanting to play a C major triad in real time requires: 3x VCO, 3x VCF, 3x VCA, 3x ADSR, 1x poly MIDI module, plus all patch cables. A software synth does this with a single patch.

Assessment

Explain why polyphony is more difficult in Eurorack than in a DAW soft synth. Design (in words) the minimum module set needed for a 2-voice polyphonic patch.