I recently purchased a Sound Blaster Titanium HD and a Sound Blaster ZXR for my computer with Windows 8.1. Creative hasn't created Windows 8.1 drivers for the Titanium HD, but they have for the ZXR.
Each of these sound cards have headphone outputs, but they don't work when I am using ASIO4all. I'm using ASIO4all with Synthogy IVORY II grand pianos. Also, I'm getting an occasional crackle or pop regardless of latency - not too bad, but I'd like to not get any. These headphone outputs work when I use other computer applications that don't require ASIO4all.
Thanks for the work. asio4all is miles ahead of the Creative ASIO drivers.