Drolo's Moon Rabbit - Envelope Detector?

[Mr. Lime]

Another great pedal by David Rolo caught my attention:
https://www.youtube.com/watch?v=EyDFgh2PF0c
Obviously Druid's StompLFO has been used to modulate the phaser circuit.
Any ideas how the envelope detector could look like?
It has to be limited to 5V maximum.
I've been looking for a simple way to control the CV inputs of the PICs for weeks and I would love to build something like a external envelope CV pedal that is connected directly to the guitar and sweeps the controls of the modulation pedals in the FX loop my amp.

The new Twin Peaks Tremolo has an option to flip the phase of the envelope follower as well.

Any ideas or even a circuit suggestion?

Thanks!

[zombie_rock123]

For envelope detectors I like the bassballs one, there's a craig anderton one that someone added to a phaser over on the tagboard effects forum and theres a great one MFOS did. Wouldnt limiting it be a voltage divider on the output? Or a zener for a hard limiter... I'm invoking Cunningham's Law here..

[Mr. Lime]

Some say that simple envelope followers suffer from ripple which has to be filtered out properly.

Limiting with a voltage divider is an option if the maximum output swing of the IC is known.
Does anyone know, what the maximum output swing of a TL074 /TL072 with a single 9V power supply is?

[Mr. Lime]

Archiving both up and down sweeps I guess the envelope signal has to be shifted around 2.5V offset but with a maximum output of 5V.

Still I'm looking for a suitable circuit. 
The MFOS envelope follower looks good in terms of adjustable wah range as offset.
Intensity, attack and decay controls are missing.

An interesting article about attack and decay can be found here:
https://www.deeptronic.com/electronic-circuit-design/envelope-detector-circuit-with-separate-attackrise-and-decayrelease-time-settings/