added some test wave files

.travis.yml

@@ -13,4 +13,4 @@ addons:
       libwxgtk3.0-dev portaudio19-dev libhamlib-dev libasound2-dev libao-dev libgsm1-dev libsndfile-dev
       
 script:
-    - ./build_ubuntu.sh
+    - ./build_linux.sh

README.md

@@ -16,7 +16,7 @@ cross compiling support).
   $ sudo apt install libc6-i386 libspeexdsp-dev libsamplerate0-dev sox git \
   libwxgtk3.0-dev portaudio19-dev libhamlib-dev libasound2-dev libao-dev \
   libgsm1-dev libsndfile-dev
-  $ ./build_ubuntu.sh
+  $ ./build_linux.sh
   ```
 
 # Building and installing on Fedora Linux
@@ -25,7 +25,7 @@ cross compiling support).
   $ sudo dnf install icmake wxGTK3-devel portaudio-devel libsamplerate-devel \
     libsndfile-devel speexdsp-devel hamlib-devel alsa-lib-devel libao-devel \
     gsm-devel
-  $ ./build_ubuntu.sh
+  $ ./build_linux.sh
   ```
   
 # Run FreeDV:
@@ -33,6 +33,9 @@ cross compiling support).
    $ ./build_linux/src/freedv
    ```
 
+The ```wav``` directory contains test files of modulated audio that
+you can use to test FreeDV (see USER_MANUAL.txt)
+
 ## Building for Windows on Fedora (Cross compiling)
 
 Install basic MinGW development packages:
@@ -87,4 +90,4 @@ Please see README.osx
 
 ## Building and installing on FreeBSD
 
-In ```build_ubuntu.sh``` change build_linux to build_freebsd
+In ```build_linux.sh``` change the ```build_linux``` directory to build_freebsd

USER_MANUAL.txt

@@ -9,6 +9,14 @@ This document describes additional features in the latest FreeDV
 releases that haven't been documented in other sources.  See also
 freedv.org
 
+Test Wav Files
+--------------
+
+In the wav directory are FreeDV audio files that can be used to test
+FreeDV.  There is one for each FreeDV mode.  Select a FreeDV mode and
+press Start.  Choose a file using "Tools - Start/Stop Play File From
+Radio".  You should hear decoded FreeDV speech.
+
 Project Horus Support June 2018
 -------------------------------