Registered Users ARE NOT Audience

Yesterday at the Radio Ink Convergence Conference in San Jose Slacker’s CEO stated they had 26 million listeners.  In their IPO filing Pandora stated they had over 80 million registered users. I’m sure what Slacker’s CEO meant to say is that they have 26 million registered users.  There is a big difference between registered users and audience.   A large number of people may register and never use the service.  Actual audience is measured by Ando Media (now Triton Digital).  For the most recent data released, March 2011, Slacker and Pandora had an AAS of 39,697 and 599,214, respectively for the time period Monday-Friday 6 AM – 8 PM.  AAS is defined at Total Listening Hours (TLH) divided by the number of hours in the reported time period.  TLH is defined as the total number of hours that the station has streamed during sessions with a duration of at least one minute in total within the reported time period.  AAS in general reflects the average number of people listening.  For Slacker and Pandora this represents .15% and .75% respectively of their registered users.  Both companies cannot monetize registered users, it’s the audience that actually use the service that matters.