See Helm project here: https://tytel.org/helm/
This repository is based on metal3d's earlier package and is used to generate the Copr repo teervo/helm-synth.
To install, first enable the repository
sudo dnf copr enable teervo/helm-synth
To install the standalone synth, run
sudo dnf install helm-synth
To install the LV2 plugin,
sudo dnf install lv2-helm-synth
To install the VST plugin,
sudo dnf install vst-helm-synth