The Delay Tracker's Auto Stop/Lock On Feature

The Delay Tracker's Auto Stop/Lock On Feature

The "Track" command (shortcut [D]) toggles Delay Tracking for the active transfer function measurement. This command has the same effect as clicking the Track button in the TF measurement's control block on the Control Bar. 

You can also turn tracking on and off for all running transfer function measurements by either using the [Shift] + [D] hotkey or by clicking the master Track button, located at the top of the Control Bar.

The Delay Tracker is designed to keep the two signals of your transfer function measurements aligned in situations where delay time may change from moment to moment. This might happen, for example, when measuring in windy conditions or measuring while the microphone is being moved. It can also be used as a delay locator when measuring delay times below 50-60 ms under well-behaved acoustical measurement conditions, or as much as 80-90 ms for effectively noiseless electronic measurements. For measurements in the presence of reverberation and/or noise (or where longer alignment delay times are expected) Smaart's dedicated delay finder may prove more reliable.

Delay tracking can operate in either of two modes: momentary "auto-set" or continuous. A single button click or press of the [D] key activates delay tracking in "auto-set" mode. 

The small circular indicator to the right of the delay field turns yellow and the tracking measurement runs. Once it "sees" identical delay times for three consecutive measurements, it automatically turns itself off. A second button click or key press in rapid succession will switch the tracker to "continuous" mode. The indicator color changes from yellow to red and the tracking continues indefinitely until you click the "Track" button/press [D] a third time or stop the transfer function measurement. The tracking indicator also works as a button to turn delay tracking on and off for any transfer function measurement when clicked.

A more comprehensive breakdown of Smaart's Delay Finder and Tracker can be found here.