HELLO FOLKS, Just upgraded to the hr=23 hddvr from the h-20. Since I lost my OTA antenna port on the HR-23 was considering buying the AM-21 tuner. My question is when I connect the AM-21 to the DVR will the off air hd programs audio signal be routed through HD RECEIVER which is connected to my surround system?? Currently I have my Off air antenna directly into my HD TV, I must switch sources to view off air and use the volume on the tv for audio. thanks.