I Tried This new Free & Open Source Synth Plugin and WOW!

I checked out Resonarium, a free and open-source physical modeling synth in a very early alpha state (v0.0.1). It's based on waveguide synthesis and resonators, capable of some wild and unpredictable sounds—so caution is key when using it. It's flexible, modular, and surprisingly powerful despite its bugs and high CPU usage. It works with different excitation sources (impulse, noise, sequence, sample, external input), and its structure is clear if you understand waveguide synthesis.