BMW Mini Wave Expander

Hylander Mini Wave Expander for use with Blacet (Wiard) Mini Wave

"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."

http://www.hylander.com/miniwave.html