Possibility of support for web audio api?

I'm recently building an [electric piano](https://github.com/AlienKevin/music-synthesizer-webview) in Elm and want to port it to desktop because of keyboard latencies. With web-view the piano is much more responsive but I can no longer use [tone.js](https://tonejs.github.io/) to play audio. After some researches, I didn't found any reliable cross-platform audio synthesis library either in rust or c/c++. It seems to me that the web audio api is currently the best cross-platform audio function out there. Can web-view support an add-on module for web audio?
Also: Electron is as slow as the browser so I can't use that.