Hi Andrew,

It seems to me you need an envelope follower.
You can find more info about a possible implementation here:
https://www.bbc.co.uk/rd/publications/rdreport_1983_17

It's about dynamic range control (compressor, expander, limiter, gate), and all of them use an envelope follower.
In alternative, you could start from here as well:
https://chuck.cs.princeton.edu/doc/examples/deep/follower.ck

Cheers,
Mario

On Tue, 25 Feb 2020 at 02:38, Andrew Telichan Phillips <a.telichanphillips@gmail.com> wrote:
Hello,

I'm wanting to capture the amplitude envelope from a live source and generate feedback loops... I'm starting by obtaining RMS values, as per the examples on the home site: https://chuck.cs.princeton.edu/doc/examples/analysis/features/rms.ck

First, does anyone have a preferred way of filtering the data that effectively captures transients and smoothes the decay?

Second, is there a way to scale the range of this smoothed data - that is, map it onto a defined range to use as a parametric control for another UGen?

While I'm at it, does ChucK have a filter for DC leak? 

I'm new to ChucK and am used to work, so I appreciate any help (and patience). 
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