Audio recording help required

[anythinggoes]

Ok i was at the NIN gig last night in Brixton and took along my mini disc to record the show which i have done but only on the left channel for some reason what program do i need to duplicate that left channel to the right channel as well without losin any or too much quality. Many thanks

[Genesis]

Any audio editor will do. Create a stereo file and copy the left track to the right, making sure they sync. Goldwave and Adobe Audition and my two recommendations.