LARM is a humanities research infrastructure for radio and audio cultural heritage. The objective is to further radio and audio based research by securing a national bibliography for radio, maturing research source material with meta-data and annotations, developing tools for access, registering, indexing and dissemination. These resources will be integrated into a virtual environment for research--a researcher’s digital radio archive and toolbox. The key term in this effort is ‘user driven interoperability’. This suggests creating an IT-architecture for the research infrastructure, which supports both the integration of various resources, tools and formats into a common platform, and keeping the infrastructure extendable. This last feature will provide easy access for new clusters of research resources, tools and open a space for practice led research and self directed learning, thus also providing material for educational use. LARM is anchored in a consortium of humanities research and national cultural institutions committed to the cultural heritage--including its accessibility, maintenance and dissemination. Partners of the consortium are: The Danish Broadcast Corporation (DR), The Danish Research Network (DRN), The State and University Library (SB), Copenhagen University (KU), Roskilde University (RUC), The University of Aarhus (AU), Aalborg University (AAU), The University of Southern Denmark (SDU), The Royal School of Library and Information Science, and Denmark’s Media Museum (DMM).