Micro-Audio input / speaker output

"[email protected]" <[email protected]> Thu, 23 Aug 2012 10:24:18 +0200

Newsgroups	gmane.comp.lib.gnustep.announce
Message-ID	<[email protected]>

Hallo,
is there on GNUstep a posibillity to get microphon for input working and 
the speaker ready for output?
What Libs are needed for audioprocessing?
Kind regards
Karl