Hi @hargan123 The following should be used: FDwfDeviceAutoConfigureSet(hdwf, 0) .... FDwfAnalogOut*Set ... // set parameters FDwfAnalogOutConfigure(hdwf, channel, 1) // start ... FDwfAnalogOut*Set ... // change parameters or set all FDwfAnalogOutConfigure(hdwf, channel, 3) // apply ... FDwfAnalogOutConfigure(hdwf, channel, 0) // stop FDwfDeviceAutoConfigureSet 0 - disabled: Device will be configured when calling FDwf*Configure. It is recommended for complex apps to pr