BACKWARD GUITAR SOLO
Thanks to Brian Greenway for this explanation in response to a question on the AW Discussion list.

"Backwards guitar solos are not what they seem to imply. The technique used is: 1st, you know that your going to do a backwards solo or guitar line. Next you work out the part. Solos should be like a melody in the song. It should say something. Start somewhere and end on a statement. Positive. Now with backwards solos you start in reverse, meaning you play the end first and the beginning last, only your not playing it backwards. That comes later. When you are satisfied with what you hear, now this is the fun and tricky part, you play the tape backwards, and voila, the solo is now ,you guessed it, backwards. There is more to it than just that. I don't think you can do this with digital machines. This was all invented in the analog days. You would record the solo onto another two track machine from the 24 or what ever track deck and then reverse the two tracks and play it back in sync with the 24. Once you got it locked up (in sync)you would transfer it back to the 24. You could do the same with a 24 track digital, but I believe you would still need a 2 track analog deck to be able to play the tape in reverse to get the effect. Even if it could be done completely on digital you would still need two decks,and be able to lock up the two together."