final gain not defined in DynamicsCompressor algorithm

[rtoy]

In https://webaudio.github.io/web-audio-api/#processing look for the algorithm for computing the reduction gain (below the audio graph diagram). In step 6.10, we have

Compute metering gain to be final gain, converted to decibel.

I take this to mean metering gain is set to final gain. But a search for "final gain" shows that this is the only place in the spec where this is used. This needs some clarification.

[rtoy]

LIkewise, the threshold and knee are mentioned in the algorithm, but not used anywhere within.

[rtoy]

Closing this. Let #1502 be the issue about DynamicsCompressor algorithm missing explanations of these parameters.