Maybe so, but unfortunatly tuning air fuel ratio's is a day of the past when we used to run carbs and our ignition advance angle was stricken between two points.
Not so much a how to, but just a case if disconnecting the sensor from the ecu and have the knock sensor itself activate a light/buzzer. This then allows the driver to back off the throttle to protect the engine. Although saying that sometimes what the knock sensor picks up maybe interference, but to know this for its best to pull the plugs and check their condition under a 4x magnifed glass for any pitting, the same can also be done using a bore scope.
If tuning an engine which has knock control I see this as a better method than tuning through det cans/knock box. Mainly on a forged engine not so on a stock engine because the pistons are too brittle. If the ecu was programmed to recieve an input from a knock sensor, make it work and use it to our advantage, no point making an engine under perform because we can hear a slight knock using det can which consequently will reduce power. Knock sensors there for a reason, if it can't detect knock it's not doing its job.