Essential reading, or not...
ffmpeg.exe : This is used for MP3 conversion, but it can be used to convert just about anything to anything else.
flac.exe and metaflac.exe : For FLAC file handling
LAME MP3 Encoder : For MP3 conversion
Ogg file format
FLAC and Ogg codecs : Install these so Matt's Music Player works with FLAC and Ogg files
Install 'opencodecs_0.85.17777.exe' or later
FreeDB database : The freeDB database was discontinued in May 2020, but...
https://en.wikipedia.org/wiki/CDDB : The original CD database, later became freeDB
freedb.howto.txt : Original freeDB developer documentation
Several servers continue to support freeDB, such as...
MusicBrainz : Open music encyclopedia
https://wiki.musicbrainz.org/History:FreeDB_Gateway : MusicBrainz no longer supports FreeDB
https://wiki.musicbrainz.org/Development : About the new MusicBrainz API
Broadcast Wave Format (BWF) Specification : WAV files that can store > 4GB (but still don't support UTF-8?)
Other interesting stuff...
hifiengine : The HiFi Engine Library has images, specifications and reviews for thousands of audio components. This includes user manuals, original service manuals and circuit diagrams, so when your favorite amp blows up, you can fix it yourself!
Reading old floppy discs : Digitize your old floppies now, before they disintegrate!
The Greaseweazle adapter connects a floppy disc drive to your computer via USB. Supports 3.5", 5.25", and 8" with a 50-to-34-pin adapter (e.g. FDADAP). You can read/write floppy disc images in almost any format: PC, Amiga, Amstrad, DOS, CP/M, DEC PDP etc.
https://github.com/keirf/greaseweazle/wiki : Keir Fraser's Greaseweazle wiki, user manual and software tools
https://retroez.com/store/Greaseweazle-V4-USB-Floppy-Adapter-Flux-Reader-Writer-p381405857 : Buy one from the UK, excellent service
https://www.retrotechnology.com/herbs_stuff/drive.html : Everything you will ever need to know about floppy disks, by Herb Johnson
https://www.dosbox.com/ : Cross-platform MS-DOS emulator, runs on Windows, Linux, Mac
http://www.freedos.org/ : Free DOS-compatible operating system, boots from CD or USB
https://www.sydneysmith.com/wordpress/run-cpm/ : CP/M 2.2 emulator running on Windows
https://www.sydneysmith.com/wordpress/z80emu/ : Browser-based Z80 emulator, boots CP/M from a disk image
https://www.kryoflux.com/ : Another USB floppy adapter, much more expensive than the Greaseweazle but has more sophisticated hardware