This is a browser-based tool to dump TEC Redshift discs (from Exapunks) into a simple text format (and JSON):
https://jaredkrinke.github.io/tec-redshift-dumper/
All of the reverse-engineering comes from TEC Redshift Disk Specification by Rami-Sabbagh. This tool uses UPNG.js.
Source code for this tool is available via "view source" or this repository.