A very famous data visualisation is the plot of the signal from Pulsar CP 1919. The reason it is famed is not least because it featured on the cover of Joy Division's album Unknown Pleasures.
This app has the data from that plot (or an approximation of it) rendered in Sense.
Unknown Pleasures
The data set can be found here:
https://bl.ocks.org/borgar/raw/31c1e476b8e92a11d7e9/pulsar.csv
Lots of detail on the origins of the album cover here:
And most importantly, you can listen to it here:
Just in case you needed an app for that. 🙂
Steve