Blazor WebAssembly Microphone app

There are a number of examples on the web to capture speech from the microphone from within a browser. ex( https://www.html5rocks.com/en/tutorials/getusermedia/intro/ , https://github.com/cwilso/AudioRecorder, https://decodedscript.com/azure-speech-recognition-angular-transcript-tran/ ) I can't get any of them to work within a Blazor webassembly app. Blazor Server side works but of course that attempts to use the microphone on the server which is no good for me. I NEED someone to build a simple Blazor WebAssembly app that allows me to capture to a file or database the sound from the microphone on the user's system. This may require asking the user via the browser for permission to access this restricted resource. (I don't know).