Ofcourse there is.
Go to:
files/audiobank/voices
Now, make a copy of the 'player' file
Rename the copy to Player - Backup
Now, go into the player file, and you will see
spawn.wav, hurt1.wav, hurt2.wav, hurt3.wav, leap.wav, land.wav, and finalmoan.wav.
All you need to do, is go over this audio and make it your own.
Use a program like Audacity, and just delete the current audio, and record your own into it.
It is a good idea to listen to it first, so you get the idea what it should sound like.
Now, to get it in game, rename the folder to something, in this case, 'example'.
In the editor, place your characters spawn marker, and right click on it.
Right down the bottom, you will see 'soundset: player'
DONT click on it to select it to select yours, it will not work.
Just delete the name player, and replace it with example.
That should hopefully bring in your own soundset.
But, you will have to change this each time you place the player's spawn point, unless you completely replace the files in the default player file.
For this all to work, It must be in the voices file, and must be in .wav format.
~TiTaniUm