Hylander Mini Wave Expander.Title link takes you to more shots and info on Muff Wiggler.
"the Expander is used along with a Blacet/Wiard Mini Wave module, allowing the MW to address a total of 10 ROMs (as opposed to the 2 ROMs that a standard Mini Wave can work with), which ultimately gives your Mini Wave 2,560 individual waveforms. Additionally, the Expander adds CV control over the currently active ROM, and a signal inverter."
