controlChanged: (device, deviceAttr, value) ->

    # value is float or #color or (Uri or null)

    if (value == undefined or (typeof value == "number" and isNaN(value)) or (typeof value == "object" and value != null and not value.id))

      throw new Error("controlChanged sent bad value " + value)

    effectSetting = @activeSettings.effectSettingLookup(device, deviceAttr)

    if @shouldBeStored(deviceAttr, value)

      if not effectSetting?

        @_addEffectSetting(device, deviceAttr, value)

      else

        @_patchExistingEffectSetting(effectSetting, deviceAttr, value)

    else