Well... Right here I suppose...
First you will need open ssh from cydia
Next (for windows, don't know what for a Mac) you will need a FTP client.
I use winscp, I think pretty much everyone does...
You have to have computer and iPhone connected to same wifi network!
Then you open winscp and you input the ip address of your iPhone where it says name. (pretty sure, trying to
Instruct through memory) your ip is something like 192.168.1.xxx then where it says login, type "root" (no quotes) where it says password, type "alpine"
You will now be in the file system of your iPhone.
Now you just gotta find that voice memo your looking for...