What you see above is the special case of taking the MP4 (MPEG4) download from https://sound.raspberryshake.net/ and using Audacity to strip out (demux) the sound information from the file. Procedure is simple: download the MP4 from the sound web app and drop the file on Audacity.
This data is derived from an audio compression algorithm and may not be a 100% reproduction of the original data (although given the low sample rate of RS, it likely has every single point of the original data).
Importing data from the community server, or your archive files, is a more complex topic. The miniSEED format used to store the data can be accessed by a number of tools described elsewhere on this web site.
Ken