fordski
500+ Head-Fier
I wish there was a way to make the alsa app settings stick longer. I find that if an album comes to an end in poweramp or even if I sometimes pause the stock LG music app, the levels default back to normal mode. Have to go back into alsa app as music is playing and activate it again. Also only other negative I've found with Alsa app is to be prepared for all other sounds to be loud! Like if you get a notification from an app. I usually will turn off notifications and alarms sounds.
There is another way through editing the mixer paths file if you're rooted. There are instructions earlier in this thread that you may find with a search. Editing the file leaves the settings permanent until you re-edit the file. Like alsa mixer you can choose the level from 0-31.
Edit: found the link here http://www.head-fi.org/t/782706/lg-v10-new-ess-chipped-flagship-android-phone-from-lg/2205#post_12390082