[Q] Xiaomi Pistons' volume buttons don't work, the mic button works topic

Hello :)
I bought these great earphones, but I am having some troubles with my devices. The Nexus 7 (2013) recognizes all three buttons as mic button (if you have any solution for this, I opened a thread here);
the Moto G LTE (XT1039), instead, doesn't recognize volume keys at all. If I press them nothing happens, while the mic button works as it should. Is there a way to make them work correctly on my Moto G? Thank you

[Q] Xiaomi Pistons' volume buttons work as mic button and don't set the volume topic

Hello everybody :)
I bought the Xiaomi Pistons 2 and tried to plug them in my Nexus 7 (2013). They sound good, but the volume buttons don't work as they could. All buttons act like mic button (one tap: play/pause; double tap: skip song). How can I make work them correctly? I'm running CM11 Snapshot 12 and, obviously, the tablet is rooted.