Finding delay from Time Data plot type

The safest way of finding the initial time delay is to plot the impulse response and manually detect where the direct sound occurs. In the example below, a part of the impulse response is plotted using a vertical axis in dB. This makes it easier to see the pre-ringing that may occur. This is seen as the small peak to the left of the first large peak. The delay is given by the large peak.

There are also other ways of finding the time delay and displaying it as a single value, e.g. if comparing several measurements when aligning a surround setup as shown in the next section. Note that the vertical axis is chosen by the vertical axis used by the Time Data plot type. The default is milliseconds, but in the examples below it is changed to meters.