I have tried everything, including resetting the buffer when I load a sound. The Console isn't telling me anything that could be causing the problem, either. Currently I am using:
Sound.LoadFromFile("Resources/SFX/Jump.wav");
SFX.SetBuffer(Sound);
SFX.Play();
Yes, I have confirmed that the file exists. SFX was initialized as sf::Sound SFX(Sound), and Sound IS a SoundBuffer. Could it be a problem with the file itself?