prerequisites: git, node.js, yarn, chrome browser as decribed here: https://github.com/hydra-synth/hydra#running-locally. run the commands below in Terminal
note: the parameters reduce the size of the download a bit
git clone --depth 1 --branch "main" https://github.com/hydra-synth/hydra.git
cd hydra
note: the --ignore-engines parameter is necessary because at the time of this writing the dependencies of hydra won't allow node.js > 16