The audio files used for unit testing have a "kink" in them

[colinbdclark]

Flocking has a set of test audio files that are used in a number of unit tests, including those for decoding and encoding audio files. However, when graphed, I noticed that there is a "kink" in the triangle wave in one spot due to a mistake in the samples generated for the test files. This should be fixed by regenerating the test files correctly. Additionally, the sample values should all be generated using known int16 values (rather than floats) so comparison and analysis of test results is easier.