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What license are the assets in this repository provided under?

Hi

I have loaded the boing.py project into VS Code running on openSUSE Tumbleweed and a Python Virtaul Environment. When I run the code it works and I see the start screen (where you select 1 or 2 players). However if I move the cursor the game quits with the following error:

pgzero.loaders.UnsupportedFormat: 'Code-the-Classics-master/boing-master/sounds/down.ogg' is not in a supported audio format.

It appears to be:

    Unknown format (not RIFF WAVE)

Pygame supports only uncompressed WAV files (PCM or ADPCM) and compressed
Ogg Vorbis files. Try re-encoding the sound file, for example using Audacity:

    http://audacityteam.org/

Is this a problem local to my machine, or are the audio files really in a format incompatible with Pygame?

Thanks in advance,
Nick

Not sure if this is a code-the-classics thing or a pgzero or pygame issue; have reported to the former. pygame 1.9.6 and pgzero 1.2 play the theme.ogg files, but upgrading either ( which requires the other to upgrade as well) breaks the theme sound, either with an error, or it just doesn't play. Re-encoding it does nothing

Code the Classics repository downloaded by:

git clone https://github.com/Wireframe-Magazine/Code-the-Classics.git

Attempting to run:
python3.7 ./boing.py
gives:
File "boing.py", line 92
SyntaxError: Non-ASCII character '\xe2' in file boing.py on line 92

Also applies to line 120,206,247,251,277,330,331

This is due to whatever editor was used to edit the system creating an 'em' dash. Replacing the extended - with a minus sign...or just deleting it resolves the problem. All of these error characters are in comments, so trivial to resolve.

Python version 3.7.6 on an Ubuntu 18.04r2 system

On:

1. https://www.raspberrypi.com/news/create-boing-our-python-tribute-to-pong/
   and
2. here in README.md there is a link (https://wireframe.raspberrypi.org/books/code-the-classics1) that mentions downloadable PDF; however, right now, both redirect to:

https://whynowgaming.com/