How do I increase my lock and keyboard sounds?

[Windows Central Question]

Lock and keyboard sounds are too low. [Lumia 735]

I had the Lumia520 with the wp8.1 update and with the Ringer Volume at half, the keyboard and the lock sound were great. Know I have the Lumia 735 and the sound is too low and cr*ppy. I have to put the Volume at least on 8 for it sounds good. I know it is nothing important but I am curious what can be and if there's a way to fix it. Thank you!