Cetacea wrote:'Klang' means sound. 'Irre' (both as a noun and as an adjective) means 'stupid, mentally retarded, idiot' etc. This is not to be rude - only to state that in terms of marketing strategy - and in the context of the problems you encounter - this may not be the most appealing or appropriate name for a company.
But it's not really meant like this.

From the homepage:
What does irrKlang mean?
Nothing special. The name irrKlang was made up from the words 'Irrlicht', the name of the free open source 3d engine which has a similar designed API like irrKlang, and 'klang', which is german for 'sound'.
("Irrlicht" means fen fire btw.)
Cheers
Norbert