source_mixing_function setting is being ignored

[pavelmarko]

VLC-Scheduler is always zipping files, even when source_mixing_function is set to chain.

Now is:
primary_playlist = Playlist( name='PRIMARY', **default_playlist_config, recursive=config.MEDIA_RECURSIVE, ignore_playing_time_if_empty=config.IGNORE_PLAYING_TIME_IF_PLAYLIST_IS_EMPTY )

Should be:
primary_playlist = Playlist( name='PRIMARY', **default_playlist_config, recursive=config.MEDIA_RECURSIVE, ignore_playing_time_if_empty=config.IGNORE_PLAYING_TIME_IF_PLAYLIST_IS_EMPTY, source_mixing_function=config.SOURCE_MIXING_FUNCTION )

[nodakamakadon]

It may be due to source mixing being under a source. Compare with the example: https://github.com/EugeneDae/VLC-Scheduler/blob/master/docs/example.yaml