Available as an assembled Module and as a DIY project.
No info about availability.
Envelope Follower, Gate Extractor and Pre-amp in one
The Oakley EFG has a fully variable speed CV output thanks to its internal four stage slew generator. Set to fast the CV output will respond very quickly to incoming audio and is therefore suitable for tracking fast moving cymbal and hi-hat patterns. Set it more slowly and it is more useful in processing overall audio volume. By using the CV output to control VCAs and VCFs it is very easy to create synchronised patterns that keep in perfect time with a drum machine or other musical input.
Another feature of the Oakley EFG, is the provision of a gate extractor. This part analyses the peaks in the music and creates a gate type signal in time with these peaks. This can be used to trigger envelope generators in time with an external drum loop or click track. Two rotary controls, threshold and response, enable you to get clean gate signals from all sorts of input material.
In addition the Oakley EFG is equipped with a wide range three stage input pre-amplifier. This allows guitars and other unbalanced external instruments to be processed simply. You can use this output for driving other modules.
The EFG is provided with three LEDs: one for input overload, one for gate status, and one for a visual indication of the slewed CV output.
These merchants probably sell this module. Huh?