This system is now P25 trunked. ALL police traffic is currently encrypted.
The "chirping" sound is Motorola's ADP encryption and *not* distorted audio. The Police channels are not locked out as they will sometimes broadcast "in the clear".
Dedicated computer is a dell Optiplex GX240 running Windows XP Professional. Scanner is a Uniden Bearcat BCD396T. Broadcasting all City of McKinney Police, Fire, and EMS talkgroups. Audio is being routed through a a Digital Signal Processor (DSP) to minimize the objectional encryption sounds.