By Jeff Strong

Undo is the most important key/function that you have in your digital system. It allows you to, well, undo what you just did. Without it, you may as well be trying to edit with analog tape, a razor blade, and adhesive tape.

How much you can undo depends on your system. Most systems give you at least 99 levels of undo — that is, you can make 99 consecutive edits and reverse them all (or just some of them). Some systems even go as far as giving you 999 undos. How’s that for insurance? So edit at will, because you can always change your mind later.

On the other hand, some systems, such as older versions of Logic Audio, have only one level of undo. This isn’t a deficit, however, because this program gives you the option of saving your selection before you make the edit.

If you choose to do this before each edit, you are essentially allowed as many undos as you want, as long as you have the hard drive space to store all those copies of your audio track.

Some systems, such as the Roland V-Studios, have a Song Optimize function. Song Optimize enables you to save the song and throw away junk that you don’t think you need, thus reducing the size of the song file.

This is a nice feature except, after you optimize your song, you lose the ability to undo anything you did before you optimized. So, if you think that you may want to undo something you’ve done, don’t click that Song Optimize button!

As you can see by all the different ways that various programs use and define editing procedures, you need to read your owner’s manual and be familiar with your program to use these functions properly.