how do i set up ringback tones so that a caller does not hear a song?

Method 1

1. Add the callers that you only want to hear a ringback song to your profile at the Ringback Tone Catalog.
2. Click on "My Groups" and create a new group that contains the callers you have set up.
3. Click on the "Set Up Ringback Tones" tab.
4. Set up the song you want only that group to hear and save your settings.  By doing this all other callers outside of this group will hear regular ringing

Method 2

1. Add the callers that you only want to hear regular ringing when they call you to your profile at the Ringback Tone Catalog.
2. If there is more than one caller you want to hear the regular ringing, click on the "My Groups" option and create a new group that contains the callers you've set up.
3. Click on the "Set Up Ringback Tones" tab.
4. Select the "Regular Ringing" track for this new group to play "All the Time".  The regular ringing song is free of charge and never expires.  By doing this, the group of callers that you have set up will always hear regular ringing.