This document discusses research on online music audiences in several countries. It summarizes current knowledge about the UK radio market and notes a "ticking time bomb" of declining youth audiences. Phase 1 will measure national audio consumption patterns through online surveys in multiple countries. Phase 2 will establish online communities for in-depth qualitative research and real-time behavioral measurement of music consumption across key consumer segments identified in Phase 1. The research aims to understand international trends in how online audiences discover and consume music.