"get rms"

[dsrenesanse]

RMS value getter through channels

[vintage]

One more thing - can we make this functionality to work more like subscription than a future? The consumption would look like this:

StreamSubscription<dynamic> _rmsSubscription;
_rmsSubscription.rmsChanges.listen((double value) {
    // do some magic with rms
});

It seems to make more sense to consume the value of RMS continuously rather than "one-shot".

@Renesanse thoughts?