According to game site Aeropause Games, Silent Hill composer Akira Yamaoka has apparently left Konami. He has worked at the company for the past 16 years.
Yamaoka's trademark music and sounds are very much part of the Silent Hill experience. He has been producer of the series since Silent Hill 3. If this is in fact true, there's no word why Yamaoka has left the company, but Kotaku is following up with Konami.