gennarakis there is a way around this if you use playlists, I agree tweaking individual song volumes live can lead to a messy workflow as it depends which song you use as a reference to where you end up with all the other songs , so this is a NO NO, I always use the master playlist volume to tweak my levels on stage remotely as this does not effect the actual song levels or other playlists and I turn up my actual device volume to maximum volume and leave it alone, to set the mixer I have my default setup sound track which is actually just a drum track recorded at full volume , I just play that at setup and turn up my playlist master to full volume, my device at full volume, then I trim the mixer input so no peak distortion is possible , then I go back to the playlist master and turn it down to reference point and away I go , this allows me to vary the volume by foot pedal substantially without ever reaching distortion in the signal path.
I also make sure all my new songs are recorded to my reference audio file so the mix is done at the start then the fine tune is done in individual songs volume in prep, then the final little tweak is done with foot pedal, this workflow if done properly should hardly need any volume tweaking on the night but there are always variables so the master playlist is the best for that.
Hope this helps those that haven’t had much sound engineering experience.
Cheers Damir