The low latency kernel is not needed by most people as of kernel 2.6.31 .
It is (was) used as far as I know mainly for audio recording, although there may have been other uses. It is difficult to find detailed discussions on the patch but I suggest you look at
Kernels >= 2.6.31 seem to work pretty good without RT patch, also for real-time pro audio usage. It's not strictly necessary anymore to install a real-time ('rt') kernel to get good results. Although the best results are still expected when using a real-time kernel. Try it, test it and decide for yourself.
NOTE: From this link they are discussing audio and "good" and "best" are extremely subjective and sometimes they are measuring things in very small time units and all the measurements on the web are old, pre 2.6.31 kernel.
Some confusion persists about the purposes of -lowlatency and -realtime kernels.
The goal of -realtime and -rt (hard real-time) kernels is to achieve the lowest possible latency at every cost. In technical slang "hard realtime systems should always meet their deadlines". Thus developers should use the most advanced programming techniques (sleeping spinlocks, PI Mutex, Full preemption, IRQ Threads and others) and sacrifice things like reliability, power-saving and throughput.
Fedora also has some quality documentation on this issue
Note the fedora links are somewhat dated and Fedora no longer maintains low latency kernels.
So a better question is, what makes you think a real time kernel is going to help you ? It does not appear you are doing anything (such as audio recording) that requires a RT kernel and the RT patch is unlikely to solve your problems with embedding.
You can always try a low latency kernel and if you have problems switch back, install and remove them with apt-get
sudo apt-get install linux-lowlatency
sudo apt-get remove linux-lowlatency
Personally I have not had any problems with the low latency kernel patch, but did not see any advantage either (I have used for audio recording only, Ardour 3 with multiple track play back, monitoring via headphones, and recording a new track).