Free CEntrance ASIO Latency Test Utility
The CEntrance ASIO Latency Test Utility is a Windows tool to measure audio delay in your computer. It measures the true round-trip latency of your computer audio setup, from input to output via an ASIO driver. You can use the LTU to test different hardware, drivers and applications.
LTU works by sending a short pulse through your audio interface and measuring the time it takes for the pulse to return. It’s accurate within .5 ms. Actual latency will vary depending on hardware configuration. LTU is compatible with any computer running Windows XP with at least one ASIO driver and corresponding hardware installed. You don’t need to use an audio recording application to measure the roundtrip latency of your hardware. LTU takes the place of the recording application for the duration of the test.
More information on the Free CEntrance ASIO Latency Test Utility