If a measurement was done without the option: “Use accoustic timing reference” there is no timing information and aligning is not required. REW will automatically have the Pulse Responses starting at 0 ms.

If a measurement was done with the option: “Use accoustic timing reference” there is timing information and aligning might be required. REW will show timing information with the Pulse Responses.

You can manually define the t=0 for a particular measurement, by the following steps:

1. Select the proper measurement and select the “Impulse” tab.
2. Press action and put the curser where t=0 should be
3. Press “Set t=0 at cursor”

You can manually define an offset for a particular measurement, by the following steps:

1. Select the proper measurement and select the “Impulse” tab.
2. Press action
3. Press “Offset t=0”
4. Adjust the offset