Touch Response Latency (Down)

This is to test the down latency behavior of a Windows Touchscreen device.

Test name

audiotouch.exe Associated compatibility requirements

Device.Input.Digitizer.Touch.Latency Test purpose

Verifies that a Windows Touchscreen device meets the response down latency requirements when the digitizer is active. Tools required

RA tool. See Hardware Requirements and Vendor Information. Running the test

Low response latency plays a large role in ensuring fast and fluid motion. This is similar to the Reporting Rate test, where a high packet rate helps ensure smooth, fluid motion. Conversely, a high degree of response latency breaks the illusion that the user is manipulating a physical object.

Note: On Windows 11 only, before running this test, set the Bluetooth & devices > Touch > “Three- and four-finger touch gestures” setting to “Off” as this can introduce a small delay into the touch responsiveness.

This test uses specialized hardware to measure the latency in touch packet delivery for touch-down. For more detailed instructions, see How to measure Touch Down Latency by using an Acoustic Measurement Tool.

Only 50 taps are required during the collection phase.

Command syntax

audiotouch.exe Passing criteria

Average latency recorded during the test must meet the requirement to complete with passing status.