In one sentence, describe what the following article is about: Apple has created several MP4-variants, including M4A, M4P, M4B, and M4R. These files can all be played in iTunes, but you can use iTunes to convert them to MP3 format as well. You cannot use iTunes to convert an MP4 video file into an MP3 audio file. Use Avidemux to convert your video files to MP3 audio. You can download and install iTunes for free from apple.com/itunes/download/. Click the "File" or "iTunes" menu and select "Add to Library". Browse for the files you want to add. Click the "General" tab if it isn't opened automatically. Import Settings... button. In the "Import Using" menu, select "MP3 Encoder". Select "Create MP3 Version" from the menu that appears. The new MP3 version will be created and placed in the same location as the original file. You can right-click the file and select "Show in Windows Explorer" or "Show in Finder" to open the folder containing the file.
Summary: Know the different types of MP4 audio files. Download and install iTunes. Add the files that you want to convert to the iTunes library. Click the "Edit" or "iTunes" menu and select "Preferences". Click the . Right-click on the file you want to convert in iTunes.

In one sentence, describe what the following article is about: Baking soda naturally absorbs odors, is very affordable, and is available at any grocery store or big box store. Place shoe inside a large zip top plastic bag. Sprinkle the inside of the shoe liberally with baking soda. Seal the bag and leave it overnight. You can also try adding a drop or two of essential oils, like lavender or sweet orange oil, to add a pleasant scent. Put the oil directly on the baking soda before applying to the shoes, not on the shoes themselves. Don't add more than a few drops, as the oil can cause even more problems by sticking to the shoes and attracting dirt. Be sure to wipe out all of the powder before putting the shoes on again. If baking powder alone doesn't do the trick, you can try using cat litter to absorb the remaining smells. Get a pair of old pantyhose. If you don't have any handy, you can use the little disposable socks available at most shoe stores for customers trying on new shoes. Fill the foot end of the pantyhose with a scoop of cat litter. If you don't have a cat, ask a friend who does if you can have a bit of litter. You will only need about two cups total, so it's really not worth buying a whole bag. Tie off the pantyhose and stuff it inside the shoe, again leaving it overnight. The litter is formulated to absorb smells and many brands will also leave behind a nice aroma. The smell inside of leather shoes is often contained in the insole, where dirt and sweat get trapped and bacteria cause a stink. Taking out the insoles is often the only way to salvage the shoes. If your insoles are removable, replace them with fresh ones. You can buy insoles based on your shoe size at any big box store or online. Look for a brand that gets good customer reviews and that is specially designed for open shoes. If your shoes do not have removable insoles, you might want to take them to a shoe repair expert. Often a cobbler can cut out the insoles and fashion new ones. This is probably only worth trying if your shoes are expensive and/or no longer available for purchase, since a cobbler will charge quite a bit to replace the insoles in your shoes. Shoe odor is caused by bacteria feeding on the dirt and sweat inside your shoes. If you want to eliminate the smell, you have to eliminate the bacteria. At the end of every day, spray the inside of your shoe with a commercial shoe deodorizer or disinfectant that is specially formulated to kill bacteria. Look for a shoe spray that is marketed for use in athletic shoes; these are the strongest available since athletic shoes tend to be the smelliest. You can also try making your own natural disinfectant spray from water, tea tree oil, and vinegar, and using this to spray your shoes instead. Be sure you leave your shoes to dry thoroughly before wearing them again. You can place them outdoors on a warm, dry day, but be sure to place them out of direct sunlight. You can also place them atop the dryer or in another warm spot inside.
Summary: Apply baking soda dry sandals to get rid of smelly odors. Try cat litter. Replace your insoles. Kill the germs.

In one sentence, describe what the following article is about: You'll need to loosen the string that you want to set to relieve tension on the string as you work on other steps. You don't have to remove the strings completely but loosen them enough so that you have room to work under them on the neck. The guitar nut is on the top of your neck, near the headboard. It's what the strings are pulled over before they are wrapped around the tuning pegs. Find a screw that's about the same height as the guitar nut and one that can fit snugly under the strings of your guitar. You may have to search around at a hardware store until you find the right sized screw. Cut off a piece of the screw by bending it back and forth with needle nose pliers. You need the piece of the screw to be small enough so that it can fit under a particular string but not affect the rest of the strings on your neck. This piece of metal will affect the strings intonation. The higher that you slide the screw towards the nut the higher your pitch will be. The closer that you slide the screw to the fret, towards the bridge, the lower or flatter the note will be. Continue to adjust the metal until your note is in tune.
Summary:
Loosen the string that you need to adjust. Find a screw that's the same height as the guitar nut. Break the screw into a quarter inch (0.63 cm) piece. Slide the screw under the string between the first fret and the nut.