<NME> README.md
<BEF> ## WALT Latency Timer ##

**DISCLAIMER:** This is not an official Google product.

 * [Post about WALT on Android Developers Blog](http://android-developers.blogspot.ca/2016/04/a-new-method-to-measure-touch-and-audio.html)
 * [Instructional videos showing how to use WALT](https://www.youtube.com/playlist?list=PLd6Fi7WgXfcCEJg1FDqNCoQfpWo7W3J5a)
 * [Detailed usage instructions](docs/usage/WALT_usage.md)
 * Mailing list - [walt-discuss](https://groups.google.com/forum/#!forum/walt-discuss)
 * Low-traffic mailing list for major announcements [walt-announce](https://groups.google.com/forum/#!forum/walt-announce)

   the screen is timed using an accelerometer mounted on the probe - [details](docs/TapLatency.md)
 * Drag latency (scroll) - [details](docs/DragLatency.md)
 * Screen draw latency - using a photodiode that detects whether the screen is black or white.
 * Audio input / output latencies. Input latency will be usually referred as microphone latency.
 

![WALT photo](docs/WALT_photo.jpg)
 * [Audio output and microphone latencies](docs/AudioLatency.md).
 * MIDI input and output latencies

The WALT app for Android can be
[installed from Google Play](https://play.google.com/store/apps/details?id=org.kamrik.latency.walt)
or downloaded in the [releases section](https://github.com/google/walt/releases); the iOS app must be built from source.

![WALT photo](docs/WALT_photo_audio_r07.jpg)


## Notes
* Hardware build instructions can be found in this repository under `hardware/`.
* Clock synchronization details are described [here](android/WALT/app/src/main/jni/README.md).
* The Android/iOS device and Teensy clocks have a tendency to diverge due to
  differing clock frequencies. This means they will go out of sync after
  several minutes. The workaround is to use the app to re-sync the
  clocks. Some, but not all tests in the app will sync the clocks when starting a measurement.
* Python code used to communicate with WALT from Linux and ChromeOS can be found
  [here](https://chromium.googlesource.com/chromiumos/platform/touchbot/+/master/quickstep/).


<MSG> Update README.md

Add link to docs/AudioLatency.md
<DFF> @@ -11,7 +11,7 @@ WALT is designed to measure the latency of physical sensors and outputs on phone
    the screen is timed using an accelerometer mounted on the probe - [details](docs/TapLatency.md)
  * Drag latency (scroll) - [details](docs/DragLatency.md)
  * Screen draw latency - using a photodiode that detects whether the screen is black or white.
- * Audio input / output latencies. Input latency will be usually referred as microphone latency.
+ * Audio output and microphone latencies - [details](docs/AudioLatency.md)
  
 
 ![WALT photo](docs/WALT_photo.jpg)

Update README.md