If you search using the terms "soundwave art," you'll find a number of programs, both online and offline that will generate images from audio sources.
The result is what could be considered a line graph, in any number of standard image formats.
I opened Audacity, a free audio editing program and loaded Hal9000 saying "I'm sorry, Dave" then chopped it down to "Sorry."
The above image is that one word, converted from stereo to mono, then expanded to fill the screen.
I found an online resource to take the screen capture and convert it to graphical data.
Because I had no valid reference for the data, I used arbitrary points to calibrate the image, resulting in values of less than one for the positive portion of the graph and greater than minus one for the negative portion of the graph. The numbers appeared in scientific notation, implying extremely small detail capability.
Using the View Data option provides for a glance at the raw numbers as well as the option to export to a file:
If the level of manual labor doesn't scare you off, you can achieve your objective.