Our good friends at Google run a daily puzzle challenge and asked us to help get them out to the geeky masses. Each day’s puzzle will task your googling skills a little more, leading you to Google mastery. Each morning at 12:01 a.m. Eastern time you’ll see a new puzzle, and the previous day’s answer (in invisitext) posted here.

SPOILER WARNING:
As a test, we’re going to leave the comments on so people can work together to find the answer. As such, if you want to figure it out all by yourself, DON’T READ THE COMMENTS!

Also, with the knowledge that because others may publish their answers before you do, if you want to be able to search for information without accidentally seeing the answer somewhere, you can use the Google-a-Day site’s search tool, which will automatically filter out published answers, to give you a spoiler-free experience.

And now, without further ado, we give you…

TODAY’S PUZZLE:

Many vocalists use this technique to sing harmony with themselves or add additional layers of sound when recording. What is the name of this method that can be done numerous times to create a chorus effect as well as add a key element missing during the Initial recording?

YESTERDAY’S ANSWER (mouseover to see):

Search [world’s first production motorcycle] to find the 1894 Hildebrand & Wolfmüller. Search [1894 Hildebrand & Wolfmuller top speed] and find 28 mph. Search [speed limits on US freeways] and find none have a speed limit lower than 55 mph. This is one ticket you can definitely beat.