[Solved] strange mastering

hi everyone, I have a good one for you all. I recently completed my record, 19 songs. I sent them off to the mastering studio and when I got them back all the panning was reversed, what I mean is, when I recorded the songs then bounced them down to stereo I had  one guitar coming out of the right channel and another guitar coming out of the left. somehow when the songs were mastered right became left and left became right.
I don't know what to do, I just got off the phone with the mastering guy and he's telling me that he has no idea what happened.
my question is, does anyone know what i'm talking about and does anyone know how I can fix it. should I tell the mastering guy to redo everything? it's really bugging me, I've also paid this guy $1000
any ideas?

thanks for getting back to me. yeah, everything is switched. what was right is now left, I can't think of any way to fix this. really sucks

I'd await further comments, but I would first talk to the guy and ask him what's up. Might be just a simple mistake he made. Seems a bit odd how he would make it unless he tranferred from a tape master (A to D) and got the output leads inverted.

Make sure he didn't screw with the phase as well I suggest.

Ta

first, I need to thank whoever it was that changed the "topic" thanks. now I need to thank all of you for your ideas. last night, right before I feel to sleep I got an idea. what would happen if I reversed the output going to the monitors? what happened is what want. however, I need some way burn a new CD with the corrected panning.
i'm wondering if I load the songs into computer #1, then run the left/right wires to my interface with the channels inverted, or I could leave them normal because it's the output I need to change left to right and right to left. then just burn a new CD. does that make any sense?
let's see

It is simple enough to load the entire 19 files into a wave editor and swap the L/R channels as a batch process.
 
As for the guy that mastered for you, it just means he used a tool somewhere that had a "Reverse Channels" setting selected and he didn't realise.  If you're happy with the sound he gave your tracks, the L/R is easily fixable.

If you're not happy with the product; hold the Mastering guy accountable.

I would still strongly recommend first to talk to the guy who did it and find out what happened in case something else unpredictable crops up later. It may seem like a simple fix as others have explained, and it probably is but don't get caught out (in case of other problems that might have not been seen yet).
 
If he supplied an ISO image for a CD it may well need to be rebuilt (if there are cross fades between tracks then it gets more complex).
 
Toby has the right idea, but be nice everybody makes stupid mistakes... :)
If he/she is untouchable and unapproachable then I agree with Craig, I know you can get some drama queens who can take things far too much on a personal level (blinding them somewhat), rather than want do the right thing...
 
Cheers.
 
 

It's not going to mess anything up, reverb or otherwise, just by reversing the channels. It's no different to wearing your headphones back to front or simply facing away from you monitors.

first, I really don't no how to post that the problem or inquirer has been solved, I would appreciate anyone telling me how to do that, because I have asked a lot of questions here over the years.
second, now that is out of the way. I want to thank everyone who responded to my problem and told me how to fix it.
right now I'm half way through the project but needed to say thanks.
the channel tools plug in is exactly what I needed. ****ing brilliant, works great. the next thing i'll do is contact the mastering studio and informs  him he has some wires crossed.
again, thank you to everyone and have a happy Christmas.
joey pinter    

Leave all cables connected as they are.
Don't mess with anything in software
Take the right side speaker and move it to the position of the left one
Take the left one and move it to the position of the right one
 
Done... problem solved