I have no problem with usage of sf::Music since I will use a single ambiental music for my game.
But I have doubts with the usage of sf::Sound.
I will need shot sounds and maybe other little sounds too, but what's better, a single Sound instance which plays these little sounds when is needed -stopping the previous one if is necessary- or an instance for each type of sound: shot, attack, bird, ....
Ah btw, when I run my program, even if I dont declare any sound, any music or anything that relies to audio, I hear a continuous BEEE in my speakers :S