Auto-Gain?

[Chazrox]

Im trying to conceptualize how to add an auto make-up gain feature that listens to the input audio over a few seconds, averages a max peak value then adjusts a gain knob.

So far I have a scriptnode with global cables getting peak data for L+R master output channels. Thats ready to read data. Im not that good at dealing with Buffers yet. Im guessing we have to fill a buffer of a certain length then use the api's I seen about getting peak values.

Can anyone point me in the right direction please?

Here's the flow:

1. Click "auto-gain"
2. Play a few seconds of audio
3. Buffer collects peak values
4. Math/ average peak values
5. return average peak value.
6. Adjust volume to pre-defined output.

ie. User sets desired output to be "-6db" , plays the track, output adjusted to match "-6db".

Thanks for any help!