Running Marshmallow on Nexus 5X. I need to have Notifications on for Light Flow to work, but I don't want to hear both the Messenger and Light Flow sounds.
Thanks for the fast response - for others reading, you turn the tone to Silent by using Media Storage to select None (below Default notification sound). I was using ES File Explorer and None didn't show as an option.
Makes sense now, but I wouldn't have thought of this before - thanks B. Diddy!