You can find Brian's original project here.
Original info:
The Cave Dweller 2015is a total re-design of the Cave Dweller project from 2012.
While the original Cave Dweller was a simple and colorful sounding delay it
had a few drawbacks;
it was pretty lo-fi, and darkened the dry guitar tone somewhat. This was
due to the limitation of using only the PT2399 for both dry signal and delay
signal processing. The objectives for the re-design were to improve the quality
of delay and dry guitar signal without requiring as many parts as a
full-fledged delay circuit such as the MBP ZP Micro. This is accomplished by
introducing a new input stage for dry signal processing and also by adding
additional filtering to the delay signal. The result remains fairly low in parts
count without compromising on the delay tone.




