I want to set up my Raspberry Pi as Bluetooth-Audio-Receiver which transports the audio via AUX to my speakers. I've read that there is PulseAudio which would solve my problem. But I want to be able to connect to this Raspberry Pi with multiple (2-3) smartphones simultaneously. So I need a program on the Raspberry which decides which source should be used. And I want also to be able to set the volume and equalize the audio (#Bassboost).
Which programming language: It doesn't matter
I'm a beginner on Raspberry Pi, I'm happy about each answer