I’m interested in sending very low-frequency (mostly subsonic) analog data (1-30Hz) over Bluetooth to my iPhone via A2DP using a Bluegiga module. However, neither in the A2DP profile definition from bluetooth.org nor in the Bluegiga manual (as far as I can find it) is there any specification for the low-frequency response of the protocol nor the Bluegiga chip.
I have not analyzed the SBC codec subband response yet, and was hoping that someone would have an answer here.
There is, of course, a spec for the high-frequency response.
I understand that low-frequency rolloff is usually provided by signal input conditioning, and don’t know enough about the circuitry of the Bluegiga module nor the performance of the SBC codec to be able to determine whether this module will work for me.