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[apps/agl-service-unicens.git] / README.md

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@@ -128,7 +128,6 @@ from the wrong relative directory, either you have to use 'set solib-search-path
     info sharedlibrary afb-*
 ```
 
-
 # Running an debugging on a target
 
 ```
@@ -154,4 +153,19 @@ Note: remote-target-populate will
 
 Note that Netbeans impose to set debug directory to ./build/pkgout or it won't find binding symbols for source debugging
 
+# Default Volume of Amplifiers
+The binding currently supports two use cases for amplifiers.
+1. Amplifiers are initialized with a default volume. The head unit uses software volume 
+   to change the volume of streaming data.
+2. Amplifiers are initialized muted. The head unit uses hardware volume (e.g. HAL-MOST-UNICENS)
+   to change the volume of amplifiers remotely.
+
+Use case 2 is the default use case. If you like to use this binding without hardware volume support
+please adopt the ```config_multichannel_audio_kit.xml``` as explained below.
 
+```
+<!-- Register 7: Master Volume (Max Volume=07 00 00 and Min Volume=07 03 FF) -->
+<!--   - together with HAL-MOST-UNICENS binding use "07 03 FF" = muted after start -->
+<!--   - otherwise use "07 01 50" = default volume -->
+<I2CPortWrite Address="0x2A" Payload="07 03 FF"/>
+```