Figure 1: Various combinations that have, thus far been considered for ham radio audio duty (see text for explanation).
For the past couple years, I have been attempting to determine what might be the best platform for ham radio and other communications related applications, with a bias projected towards looking at mobile platforms. The graphic (above) shows a few options that I have seriously considered, and a couple for which I have built prototypes to aid in the testing process. The graphic is not intended to imply any capability or lack of capability with respect to the hardware, the SoC chip based SBC boards, or the operating systems. The selection only implies what I have made as a personal preference, for reasons that (shortly) – I’ll enumerate. In other words, the Raspberry Pi may use USB Audio, but I would prefer I2S if I can make it work. Many alternate combinations are possible, and I have refined a list of preferences for the audio configurations I’ll use. I have more info about this subject at:
(The link goes to another of my blogs)