Amazon is making it easier for developers to add a variety of sound effects to their Alexa skills. The tech giant has launched a library full of built-in audio clips people can use to add -- in Amazon's words -- "unique sounds" to their creations. Of course, by the time most developers are done tweaking their skills to add the audio clips, they'll no longer seem unique. In fact, you should probably probably get used to hearing the same thing again and again. But developers do have quite a wide selection to choose from with 14 categories that include sounds you'd usually hear in cartoons and sci-fi shows, as as well as sounds of nature, humans and animals.