MOS values below 1

[D1mme]

Dear authors,

Thanks a lot for making your code readily available and easy to use :)

I had a question regarding the MOS values. If I understand correctly these are supposed to range from 1 to 5.
In my case, I sometimes get smaller values, I was wondering if this is expected behavior or not?

An example set of predictions I get is:
mos_pred = 0.67, noi_pred = 1.15, dis_pred = 2.2, col_pred = 1.33, loud_pred = 1.47

It might be worth noting that I am using NISQA outside its intended domain at the moment (speech enhancement for atypical speech).

Thanks for your reply!

Dimme