I struggle to understand how – using one AudioContext – I would achieve the following:
I use createMediaStreamSource to create the source of the context – works.
I then connect a volume node to the source – works.
I then want to create TWO outputs: One is the "standard" output (the speakers) and the second would be used to feed into a mediaRecorder
I struggle with the 3rd point. How do I specify a different output than speakers? Is the output still a stream I can feed into MediaRecorder?
From what you describe, I assume that you have some code that looks like this:
mediaStreamAudioSourceNode
.connect(gainNode) // your volume node
.connect(audioContext.destination);
You just need to add another MediaStreamAudioDestinationNode and use that as an additional output.
const mediaStreamAudioDestinationNode = new MediaStreamAudioDestinationNode(audioContext);
gainNode.connect(mediaStreamAudioDestinationNode);
const mediaRecoder = new MediaRecorder(mediaStreamAudioDestinationNode.stream);