Daisy Seed is a standalone microcontroller + RAM+ Audio CODEC board.
You don’t need any Arduino boards to go with it, but it can be prgrammed using the Arduino Development Environment.
A Daisy Seed sure can live on a breadboard, but it needs quite a lot of external electronics to make it work - Input and output amplifiers including voltage converters. There’s no documentation except the schematics (with crypic annotations) on how to build it all - you’re on your own if you don’t buy the Daisy Pod as a minimum “host” for the seed. Questions about voltage conditioning for the seed inputs are often not answered on the forum.
“getting started” is here: Home · electro-smith/DaisyWiki Wiki · GitHub
Are you sure you really need the Daisy ? You’re talking puredata patches and knobs.
Maybe check out the Raspberry Pi Pico for starters, to generate MIDI messages from knobs, buttons and sliders, and let the computer generate the sounds.