Foxsat HDR -how will it treat recorded radio?

[Newoldie]

Does a Foxsat HDR just record the audio from a radio channel or does it also record a "blank" video signal and thus use more disk space?

I expect its smart enough to tell the difference but I am just curious as I am looking to buy an HDR as an upgrade from my old Foxsat box.

I did look at the manual online without finding the answer.

Thanks in advance,Dave

 

[grahamlthompson]

It's a transport stream file with only audio content. There's no video stream.