I believe what ballgame mode actually does is only keep the HD signal active for the text data and HD2/HD3/etc. subchannels (if any, on FM). On the main HD1 channel, the receiver will still light up the HD indicator and show text data, but will be playing the station's analog audio.Not sure if it's in the newer versions of the software, but there used to be a "ball-game mode" that set the diversity delay to zero. I always thought this was odd - that they would sacrifice the listening experience for HD radio users in favor of the ones in the ballpark with portable radios. Much better to follow Ralph's lead and turn HD off.
Dave B.