Playing sound on multiple sound devices via SDL_mixer

I am using SDL_mixer 2.0.2 and I have 3 connected wireless Headsets (their dongles have their own driver).

I want to play 3 concurrent .wav file on all those 3 devices.

I call
Mix_OpenAudioDevice(44100, AUDIO_S16SYS, 2, 4096, “2- Gaming Headset”, 5);

But if I call it 3 times only the last device plays, from that I understand that, only the last opened device plays the sound.