Are you running the latest Sound blaster drivers? If not get them here:

http://www.guru3d.com/files-details/creative-sound-blaster-z-series-driver-download.html

If this doesn't work try using the drivers that came with the unit. Note that if you are not seeing MIDI volume controls then possibly there is a problem with the MIDI portion of your card and/or your drivers.

Also in the BiaB MIDI edit mode check for CC7, CC2 or CC11 as these effect volume. CC7 is the main volume controller and maybe your keyboard is sending a low number, i.e. low numbers mean low volume. This only has to to with volume and not your latency problem.

Note that in virtually all cases ASIO drivers are needed to eliminate latency when recording.

One thing to understand is that Creative cards are for playing games and watching movies but they are not the best for recording music. If you want the least amount of latency you should invest in an USB Audio Interface. Even the least expensive Audio Interface such as a Focusrite Scarlett Solo:

https://www.sweetwater.com/store/detail/ScarlettSoloG2

Or any other popular brand will get you there.

good luck and I hope this helps.

My momma didn't raise a fool. And if she did it, was one of my brothers.

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware