If a .jam file is created under a specific locale ("fr" for exemple) that use comma decimal separator, there is problem using it with another locale ("en" for exemple) that use point for decimal separator.
How to reproduce it:
$ export LC_ALL=fr_FR.UTF-8
$ jamin -d
-> Then update equalizer settings and save it in fr.jam.
$ export LC_ALL=C
$ jamin -d -f fr.jam
-> Equalizer settings are restored the wrong way.