thank you very much for the reply,
it must be true indeed that

I also assume 32-bit audio corresponds to the bits per sample.

as if i normalize with True I get a tensor with max and min values [-1,1]:
max: 0.0881
min: -0.1289
while if I use normalization=16:
max: 11821056
min: -17301504
and for normalization=False:
max: 1.8914e+08
min: -2.7682e+08
indeed the std and avg of the data loaded using normalization True are between 0 and 1 so it seems like the correct normalization for the data I’m working with.
Thank you very much again