I have been using hump libraries including gamestate and timer and they worked quite well. However once I needed precise timing, hump.timer failed most of the time. Sometimes the tweening transitions were not finished, other times they went further than requested. Supposedly by the docs for Timer.af...

Magic.

Possibly not much use to a lot of people but I found myself wanting to interrogate LÖVE to see all the modules and variables and ended up making this little browser. Click on the name of any table to drill down. "But," I hear you ask, "if I wanted to know that stuff, why wouldn't I j...

Glad that worked.

That app/channel might be muted, Linux uses separate outputs (pulse audio) for each audio source and each audio output can be individually muted. Go to application volumes in systray and check that.

What system, provide details on how you launch it (graphical UI, from console etc.)

I would recommend maybe going over code of these libs: https://github.com/Ulydev/wave (If I understand it already provides pitch modulation etc.) https://github.com/tesselode/ripple (This one has some effects) I haven't studied the code, but I would start here for some inspiration and tips. Reverb i...

You can just learn LOVE and find things of Lua as you go. You will have to learn common things like table handling, loops etc.

You can have a body with multiple chained polygons (fixtures) so you could test iterating over all of them. But yes, concave only, the whole Box2D model mostly depends on that assumption.

Yes, this:
https://love2d.org/wiki/Shape:testPoint