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## Audio  Audio can be used to narrate content in words, or to  demonstrate a scientific concept. Most likely Today's scientist are most familiar with  audio would be from terrestrial sources, perhaps instruments as the soundtrack to narrated videos that can standalone (as in recordings of talks),  or recorded lectures, but that can accompany content within  a nice paper. A narrated video  exampleis that  of gravity waves, e.g. [This the latter  is discussed below, with reference to "Interacticity." Less familiar to most scientists today is the process of sonification,   \cite{http://adsabs.harvard.edu/abs/2012IAUS..285..133D}, where information that may not be inherently auditory such as  the gravity wave signature power spectrum  of merging black holes](http://web.mit.edu/sahughes/www/Sounds/iota_20_0.998_h.wav) the CMB or pulsations  from [Scott Hughes at MIT](http://web.mit.edu/sahughes/www/sounds.html) Gamma Ray Burts are encoded into sound streams. For some, these sonifications can add another channel of data appreciation and formal publishing systems should be prepared to accept audio.