You can set parameters for Meson Player using settings.ini files and/or command line.
Upon startup Meson Player will look for
settings.ini file in the following places:
<user's home directory>/.mesonplayer/settings.ini
The settings in the second file overwrite settings from the first file.
In case you want to use settings.ini file you'll have to manually create this file and save it to any of the above mentioned locations.
settings.ini has common INI format:
;comment line [config] auto-numlock=true balloons=true frequency=44100
It's better to leave the first line empty or place a comment in there.