Polish README

README.md

@@ -2,6 +2,11 @@
 
 > Converts MIDI files into music box scores that are ready to print.
 
+This is a command-line program that converts MIDI files to scores that can be printed for 30 note music boxes (such as [this one for example](https://smile.amazon.co.uk/dp/B0774TSP3T/)). While it does not currently support other music boxes (I don't have any others on hand), it could be extended to support them fairly trivially given the track width and the names of the notes it can play.
+
+If you are unsure of how to create a MIDI file, I recommend [Musescore](https://musescore.org/), which is a free and open source music notation program that has a MIDI export function.
+
+
 ## System Requirements
 
  - Linux:
@@ -67,11 +72,16 @@ pdfposter -s1 score.pdf print.pdf
 ```
 
 
-## Useful Links
- - [ffmpeg - showspectrumpic manual](https://ffmpeg.org/ffmpeg-filters.html#showspectrumpic)
- - [Frequency to Musical Note Converter](https://newt.phys.unsw.edu.au/music/note/)
+## Real-world usage
+ - (none yet - [get in touch](https://starbeamrainbowlabs.com/) if you've used this program somewhere cool!)
 
 
+## Useful Links
+A collection of links that were useful in making this program.
+
+ - [ffmpeg - showspectrumpic manual](https://ffmpeg.org/ffmpeg-filters.html#showspectrumpic) -- useful for analysing the frequencies produces by a music box
+ - [Frequency to Musical Note Converter](https://newt.phys.unsw.edu.au/music/note/)
+
 
 ## Contributing
 Contributions are very welcome - both bug reports and code contributions! Bug reports can be made to my email address (available on my website <https://starbeamrainbowlabs.com/>). Code contributions can be sent as a patch via email. Do this to generate a patch file you can attach to an email: