If it's always 1/2 step, it's either bad playback of ancient technology like vinyl and tape, or the use of so-called historical tuning. An A=415 Baroque tuning will sound exactly 1/2 step below A=440.
A whole step in a piece for bass would be the use of orchestra tuning in place of solo tuning or vice versa. There's also 1/2 tuning in Viennese tuning.
Other than that, yeah, get your hearing checked.