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-README for PortAudio Loopback Test
-
-Copyright (c) 1999-2010 Phil Burk and Ross Bencina
-See complete license at end of file.
-
-This folder contains code for a single executable that does a standalone test of PortAudio.
-It does not require a human to listen to the result. Instead it listens to itself using
-a loopback cable connected between the audio output and the audio input. Special pop detectors
-and phase analysers can detect errors in the audio stream.
-
-This test can be run from a script as part of a nightly build and test.
-
---- How to Build the Loopback Test ---
-
-The loopback test is not normally built by the makefile.
-To build the loopback test, enter:
-
-  ./configure && make loopback
-  
-This will build the "bin/paloopback" executable.
-  
---- How To Run Test ---
-
-Connect stereo cables from one or more output audio devices to audio input devices. 
-The test will scan all the ports and find the cables.
-
-Adjust the volume levels of the hardware so you get a decent signal that will not clip.
-
-Run the test from the command line with the following options:
-
-  -i# Input device ID. Will scan for loopback if not specified.
-  -o# Output device ID. Will scan for loopback if not specified.
-  -r# Sample Rate in Hz. Will use multiple common rates if not specified.
-  -s# Size of callback buffer in frames, framesPerBuffer.
-  -w  Save bad recordings in a WAV file.
-  -dDir  Path for Directory for WAV files. Default is current directory.
-  -m  Just test the DSP Math code and not the audio devices.
-
-If the -w option is set then any tests that fail will save the recording of the broken
-channel in a WAV file. The files will be numbered and shown in the report.
-
---- ToDo ---
-
-* Add check for harmonic and enharmonic distortion.
-* Measure min/max peak values.
-* Detect DC bias.
-* Test against matrix of devices/APIs and settings.
-* Detect mono vs stereo loopback.
-* More command line options
-   --quick
-   --latency
-   --duration
-* Automated build and test script with cron job.
-* Test on Windows.
-
-
-/*
- * PortAudio Portable Real-Time Audio Library
- * Latest Version at: http://www.portaudio.com
- *
- * Copyright (c) 1999-2008 Phil Burk and Ross Bencina
- *
- * Permission is hereby granted, free of charge, to any person obtaining
- * a copy of this software and associated documentation files
- * (the "Software"), to deal in the Software without restriction,
- * including without limitation the rights to use, copy, modify, merge,
- * publish, distribute, sublicense, and/or sell copies of the Software,
- * and to permit persons to whom the Software is furnished to do so,
- * subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
- * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
- * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
- * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-/*
- * The text above constitutes the entire PortAudio license; however, 
- * the PortAudio community also makes the following non-binding requests:
- *
- * Any person wishing to distribute modifications to the Software is
- * requested to send the modifications to the original developer so that
- * they can be incorporated into the canonical version. It is also 
- * requested that these non-binding requests be included along with the 
- * license above.
- */