Is there such thing as a free lunch? Occasionally. And occasionally there is free library music suitable for production.
Just got the information about a Free Royalty Free Music website, where right now everything is Free. They just want a link on your website somewhere. They will have stuff for sale at some point, but there will always be some free stuff too.
A quick look at the titles on the first page shows some pretty dark themes! Angel of Darkness, Armies of Doom, Attitude Gone Wrong, Bad Consequences and so on. But dig a bit deeper and there is a lot of other stuff with some Country, Beautiful, Clubbing, etc.
They have some free “sound effects” too – which are mostly little musical stings using various instruments.
So enjoy some free music – and go buy someone lunch.