Guitarscapes is built on a foundation of electric and acoustic guitars, plus mandolins and pedal steels. Sometimes the sources are obvious, but more often they’re not.
There are two AJH modules on review: the Sonic XV, based around an early 24dB diode filter from the Musonics Sonic V; secondly, the discrete transistor-based Ring SM, which can double as a five-input mixer and incorporates a pair of sub oscillator generators.
It’s always fun to discover modules with a different slant on things. The ADDAC503, or Marble Physics, is a CV source that models the behaviour of a marble on a square tray...