While it's true Radiofeed (located on Proscan page I linked) is free to use if you just want to listen & have no desire to view or control your scanner, the only drawback is you can't use the 536HP's wifi connection to feed audio (Audio source: URL) like you can with Proscan. You need to use your computer's sound card & connect an audio cable (not supplied with scanner) to 536HP's headphone (front) or external speaker (rear) port then set audio control source accordingly