Turn samples into mono?!

Hi, I'm sending some tracks to be mastered and pressed to dubplate later this week as part of a university project but just found out the bass needs to be mono...
I've sampled off various vinyls and mp3's so not sure if they are already mono

Is there a way to turn tracks to mono on the MPC?!

Thankyou in advance

http://mpc-forums.com/viewtopic.php?f=5&t=139749

http://mpc-forums.com/viewtopic.php?f=5&t=139775

A couple of recent threads that may be of interest to you.

Issues such as this are usually found in the 'Production Techniques' forum.