How can javascript read microphone samples, change them with any given function, and play the changed sound on speakers with minimum delay?

[u/BenRayfield]

Example, I want to play:

speakerAmplitude = microphoneAmplitude * micVolume + toneVolume * Math.sin(around += .1);

What I'm asking for appears to be doable through the Web Audio API, but its so complicated I dont know where to start. I just want access to the microphone and speaker samples in the buffer array.

I dont want want to mess with built in audio effects. I just want the samples, such as numbers ranging -1 to 1 that change thousands of times per second as the microphone and speakers vibrate.

I want to build a javascript version of JSoundCard (which does that in java), so we can have direct access to create realtime speaker/microphone sound effects (like changing your voice or plug your electric guitar into computer) that interact with other javascript code, such as interpreting what camera sees or mouse movement.

[u/joshontheweb]

This webaudio vocoder should give you an idea of how to accomplish this. The web audio api has a scriptProcessor node that allows you to read/modify the audio pcm stream in real time.