Daryl, all of what you say in the last two posts is true. I don’t dispute any of it.
What I don’t believe is that you can send TV audio in the bandwidth I can sense over BLE without an order of magnitude more frequency range. Do the math.
The audio doesn’t have to be 44KHz CD quality to be “hi-fi”. From what I hear through my TV connector, the audio is at least 16 bits and at least 8KHz. Nyquist sampling frequency would have to be 16 KHz minimum. As I have said, I have a TV Connector and I’ve done enough audio engineering to know this frequency range is actually conservative. I can also tell it’s stereo.
You need 32 KBytes/sec to transmit that data and BLE has less than 8KBytes/sec if you stretch it and disable retransmissions.
The TV connector drops out in either ear, and we know the right HA is the only one that makes BT Audio connections, so it’s not A2DP BT.
The Sonova chip says “The integration of CEVA’s advanced Bluetooth Dual Mode IP into our wireless chip enables us to bring low power stereo audio streaming and data connectivity to our hearing aids…” which means Standard BT A2DP and HFP for stereo audio streaming and phone calls, and BLE for data connectivity for power level and program selection.
(EDIT) Sorry I didn’t realize that the Sonova chip was relaitve to the TV Connector directly. Some of that last paragraph doesn’t apply to the TV connector. (EDIT)
Neither BT Profiles nor BLE GATT profiles can perform one-to-many streaming.
Sonova also says they support client IP which would support a custom 2.4GHz protocol over Bluetooth physical-layer transport for true one-to-many receivers for TV Connector streaming.
So a Bluetooth symbol on a frequency range and a vague word-association with a multi-protocol chip does not imply that the TV Connector uses any of the available Bluetooth profiles when it flies in the face of all the information and empirical evidence. All the information except for a single graphic symbol taken out of context.