The Decibel Eleven Loop Expander™ is a true bypass audio switcher that adds programmable effects loop switching to any MIDI controlled setup. Use it to add loop switching to any existing system with a simple MIDI controller, or utilize it to expand the number of true bypass loops with a DB-11 Pedal Palette™ or Switch Dr.™ For larger rigs, connect multiple Loop Expanders™ in a series to create additional loops. DB-11 Loop Expander™ works with MIDI Program Changes or MIDI Control Changes. The compact size mounts conveniently underneath pedals or on a rack shelf.

https://www.decibel11.com/products_loop_expander.aspx