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Diffstat (limited to 'docs/usage/WALT_usage.md')
| -rw-r--r-- | docs/usage/WALT_usage.md | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/docs/usage/WALT_usage.md b/docs/usage/WALT_usage.md index 24fd990..a77e5d7 100644 --- a/docs/usage/WALT_usage.md +++ b/docs/usage/WALT_usage.md @@ -6,7 +6,7 @@ This document will show you how to set up and use your WALT. About WALT: * Source code: https://github.com/google/walt - * [Youtube playlist](https://www.youtube.com/playlist?list=PLd6Fi7WgXfcCEJg1FDqNCoQfpWo7W3J5a) + * YouTube [playlist 1](https://www.youtube.com/playlist?list=PLd6Fi7WgXfcCEJg1FDqNCoQfpWo7W3J5a) and [playlist 2](https://www.youtube.com/playlist?list=PLd6Fi7WgXfcB4Ma6A-5rPlr1jptNR3RxQ) * [Android Developers blog post](http://android-developers.blogspot.com/2016/04/a-new-method-to-measure-touch-and-audio.html) ## Prerequisites @@ -32,6 +32,8 @@ A test device and cables: ## Setup +[Video demonstration](https://www.youtube.com/watch?v=qR48GPepyxU&list=PLd6Fi7WgXfcB4Ma6A-5rPlr1jptNR3RxQ&index=2) + * Install and run the [WALT Android App](https://play.google.com/store/apps/details?id=org.kamrik.latency.walt&hl=en) * Connect WALT to the Android headset using the 3.5mm male to male TRRS cable * Connect WALT to the Android USB port using the cables above. (see photo at top of doc) @@ -136,6 +138,8 @@ until the first frames of that buffer were detected by WALT device via the headp ## Screen response latency +[Video demonstration](https://www.youtube.com/watch?v=FePSFTxBux4&list=PLd6Fi7WgXfcB4Ma6A-5rPlr1jptNR3RxQ&index=3) + * Tap screen response * Set screen brightness to maximum. On phones using PWM for screen backlight brightness control, yo man need to turn adaptive brightness off (settings -> Display -> Adaptive Brightness) * Position WALT with the screen sensor looking at the screen (the light sensor recessed into the large plastic surface). @@ -231,6 +235,8 @@ Medians, p2k & k2c [ms]: 19.5 1.7 ## Drag/scroll latency +[Video demonstration](https://www.youtube.com/watch?v=pVy5AYVzf7Q&list=PLd6Fi7WgXfcB4Ma6A-5rPlr1jptNR3RxQ&index=4) + Drag latency is measured by dragging a finger up and down along the screen. The finger interrupts a laser beam positioned across the screen. By comparing the timings of those beam interruptions with Android touch events the WALT app calculates the delay. |