Bluetooth AptX LL or other wireless low latency alternatives

I built some auto-playing instruments with the mini solenoids and I’d like to send wireless microphone outputs to a common receiver/selector (the instruments are in different rooms). The stream has to be low latency (after some operations with CMOS op-amps).

I’m getting lost in the internet jungle… anyone has suggestions for a module with a breakout board that meets the following requirements?

  1. Bluetooth stereo audio module which allows AptX LL (standard 5v supply for either lion battery or direct usb).
  2. It can be configured as transmitter or receiver by flashing code.
  3. I want to upload the code containing the pairing information and establish a connection between transmitter and receiver modules when the devices turn on, without the intervention of smartphone or computer.
  4. I want to change the pairing only when selecting between 4 transmitters with a selector on the receiver device I’d like to build.

I’m also open to deal with normal Radio Frequency but, in case I have to go with RF, I’d like something more than the 10m range of the Adafruit Stereo FM Transmitter with the Si4713.

please share some photos and videos of your work!

(sorry i can’t help you with your questions)