Thanks for the reply, David. We are using ENMFP. Even if not intended for use with over-the-air, it works pretty well in identifying songs, with an extremely low rate of false id's. Again, most of the issues we have are with it not at all identifying newer releases (from pre-release through a few weeks post-release). We haven't tried with Echoprint, but the dramatically smaller library there is most likely to result in much less than a 60% success rate for us.
We are a non-commercial, public radio station that tends to play newer material. A few "known" artists whose new releases are not yet recognized: Cold War Kids, Jenny Lewis, Tama Impala, Foxygen, Interpol.
Thanks...