Hey, at the moment there’s only MODEP image available. The other kind of ‘image’ is flashing Raspbian Lite or Raspbian Desktop, and running the
install-pisound.sh from blokas.io.
When having connection issues, unpairing and pairing the devices helps, especially if the OS was reinstalled, as each time some private keys for communication are regenerated, so the old pairing is invalid.
You may use
sudo bluetoothctl on Raspberry Pi to access low level bluetooth stuff on the system, there are commands available for listing paired devices, pairing, ‘trusting’, etc… You could try playing around with them, type
help for a list of available commands and hopefully the internet has information on what they mean.
Normally such manual tinkering is not necessary, we haven’t yet find an Android device that would fail to work with Pisound, but we can test only a fairly limited set of them… What is the Android device you are using?