I don't know what that is.

There is a larger tutorial here: https://forum.ddnet.org/viewtopic.php?f=16&t=5765

I'm not seeing an error, does it work now?

Did you download ddnet-libs too? See https://github.com/ddnet/ddnet#cloning
It is required for building on Windows, except if you have exchndl.dll and the other drmingw libraries already installed.

Other than that, this guide might help you: https://github.com/ddnet/ddnet#building-on-windows-with ...

Do you have read/write permissions on the sqlite database file? If not, you can set them and try again. Otherwise maybe the file is corrupted, try removing it.

This is a vote ban, not much we can do about those. The players on each server can decide to ban others.

It's not open source I believe.

This exists on KoG server in the form of moving tiles.

Bitrate is fine. The only thing I see is s32p, while our files all use s16p. I'm not sure how to change that in the tool though, sorry.

I think you can just try the default in lossless mode or hybrid, it shouldn't matter. I haven't tried this frontend though.

The wavpack frontend from https://www.wavpack.com/downloads.html should work too.