It's a non-profit homerecording music studio for progressive metal, prog-rock, ambient and 'darker' music like black metal. Keywords like 'forest', 'pagan', 'witch' and Lord of the Rings come to mind. The E in WarnEdt should stick out, but does not have to be a capital. The name refers to a forest nearby called 'Warndt' (without the e) that has been mentioned for the first time in the year 999. A reflection of the 999 as 666 could be a devilish 'joke'.