The Isolated Select Bus Cable from Make Noise allows an internal connection between TEMPI and René 2, which is isolated from the CV-BUS of the BUS board. This is useful if the CV-BUS of the BUS board is already used by modules from other manufacturers such as Doepfer or Tip-Top, which are notcompatiblewith the Make Noise Select-BUS format of . This cable is also the solution if a system only has a bus board with power supply, but does not have the function of a CV/Gate bus.