AM8105 Overview
This module is a clone of the 24dB Low Pass Filter and Voltage Controlled Amplifier in the Roland JX-8P. The circuit is based around the Roland IR3R05 chip which first appeared in the MKS80 REV5 replacing the IR3109 and CEM3360, and then made its way into the JX-8P, MKS70, JX10 and Alpha Junos. The filter and VCA was usually followed by a 1-pole High Pass Filter in these polyphonic analog synthesizers.