WebAssembly is used here to compile Chirp's proprietary software from C into something the browser can understand. There is years of research and development b

WebAssembly is used here to compile Chirp's proprietary software from C into something the browser can understand. There is years of research and development behind Chirp technology, which makes it robust in noisy and extreme environments. So it is definitely possible to produce something similar in pure JavaScript, but it would be no where near as resilient.