Been working here and there with Giorgio’s software for many years now - so many great pieces of software.
One I’d really like to mention, because of how it can be used with Renoise is the “Substantia” physical modeling synth for those of you who work on Macs, which can be found here: https://www.giorgiosancristoforo.net/softwares/
The reason I bring it up is because it has offered me a way to construct sounds that I can’t design within Renoise itself, and also reminded me of a way to combine both physically modeled sound samples AND Renoise’s built in synth to be a combination of a physical model and a tone generator.
What’s especially nice about Substantia is that it’s not your typical physical models. It’s based on various resonators and an amazing array of materials. Maybe you want a pentagonal bowl made of tin, or a wire rack made of nylon. You’ll get some beautiful results out of this software which can be exported and turned into the ‘attack’ portion of your sound, or if you’ve really got the moxy, you can turn them into pads and other sounds. Heck, you can use other samples to modulate the sounds via transients or with contact mics.
For those who desire to move into an electroacoustic direction, but do not want to strum a guitar or or pluck a harp, or play the piano in your living room, this software will really provide an interesting array of simulated sounds. Sounds that I’ve never heard created by other synths.