Can you share your source ?

Looks okay to me

I found this software hope this one help you to sort your problem   http://www.similarityapp.com/

Well, that was my opinion they can accept it or reject it plus this an option that the user can set it ON or OFF. Maybe I should change it to safety option to address teenage people too, Some people distracted and forget how long they are listening to high volume. If Fiio need a professional...

heartbeat ? well thats don't look like murmur too lol this is what i heard Turn on device > plug the headphone > play > Click.Click.3milsec. Click > now music start   @Joe Bloggs: Could you guys open source the firmware so we can customize the codes?

Yes modern amps do that but in older firmwares I heard only one click not double clicks.   Okay, I find a way reset the setting to the factory and do fresh install again.

I can reproduce this, tested with IE80 and D770         Request for safety of young people: I have cousin that love to use my x5, but sometimes she increase the volume that will shock my ears! She dont know how to use high volumes and manage the time, so Please show alert like "high volume...

Does anyone have problem with favorite songs section? When I try to play it after a few minutes device will freeze, Can someone reproduce this bug?