I saw many tutorial of SDL_mixer but none of them are used Mix_Init function. I saw this Mix_Init function on the documentation page https://www.libsdl.org/projects/SDL_mixer/docs/SDL_mixer.html
The tutorials are only used the function called Mix_OpenAudio for initialize SDL_mixer.
My question is that Is if I call the function Mix_OpenAudio, it automatically call the function Mix_Init or there is no need to call the function Mix_Init.
Is Mix_Init function is only some type of checker function.