I would like to know the answer to this one too as I would love to be able to use my USB headset with the radio. However, I suspect this may not be easily achievable having had a brief play around as the audio primarily appears to be hardwired to deliver/accept audio to the sockets on the side of the radio or the physical speaker within (Arfan correct me please if I am wrong).
It may be possible using the loopback device capabilities but this seems a little complicated at first glance and needs some clearer description on how to route the audio from maybe one of the loopback devices to the USB or Bluetooth connected device.
My immediate approach is to work on getting a PC headset working via the connectors on the side of the radio at the moment using a splitter based approach that is wired from a small project box to house the TRRS connector that most PC headsets can use and the box has the PTT button on it as well. This approach works so far but the audio level on SSB is too low to get the power out of the radio (commented on many times elsewhere in the forum), this I am hoping to solve using a microphone pre-amplifier based on an SSM2167 module that I will fit into the radio, need to find a suitable 4-5v tapping point to power it - to be continued. will perhaps start a separate thread for this one once I have it sorted. I would like to know though if it is possible to use either Bluetooth(built into the pi) or USB type headsets as it will add to the versatility of the radio especially for portable voice communications which is how I would like to primarily use this radio, Paul G0KAO
