By Bradley James

There are just a few audio compression formats out there, just like there are only a few image compression formats (you may have heard of them: JPG, GIF, BMP). Two of the most popular audio formats are WMA, or Windows Media Audio, and MP3 (Short for MPEG, Moving Pictures Experts Group, Audio Layer 3). WMA is the older audio format, produced by Microsoft, to work with Microsoft’s Windows media player. The WMA compression format was designed specifically for this format, and thus can not be converted to other audio formats.

The audio quality of WMA and MP3 audio formats tends to be noticeably different. WMA is a decent quality audio format when streaming at phoneline speeds (maybe 30kbps or so). At such speed WMA almost reaches an FM level of audio quality, although not quite. At 128kbps, Microsoft claims the WMA is nearly CD-quality, although many would deny this. WMA, however, is not to be completely looked over. The compression provides relatively small audio files and they require less processing power to execute. It thus retains a deminishing niche as MP3 has become more popular and widely used.

The MP3 audio compression was developed in Germany in 1991 by the Fraunhofer Institute. MP3 typically provides higher quality sound than WMA because it uses perceptual audio coding to compress CD-quality sound by a factor of 12. As a result, MP3 has become almost the universal standard among audio usage and broadcasting. It provides CD-quality sound at reasonable compression sizes and high streaming speeds. Watch out, however, at low bitrates, as MP3 quality will likely suffer.

Bradley James is a senior editor at SciNet.cc, a website containing many helpful consumer electronics review articles. For more information on MP3 and WMA audio formats, please visit our MP3 vs. WMA webpage.Article Source: http://EzineArticles.com/?expert=Bradley_James

By Alan Twigg

My name is Alan Twigg and I’m writing this article to offer advice to anyone thinking of creating their own professional audio books.

In the New Year I came up with the idea of creating professional children’s stories and offering them for download on the internet. The thing was, however, while I had someone to write the stories - my mother - and someone to market the stories – me, I knew nobody who knew about how to record the stories professionally. I knew it must be reasonably easy, since I only wanted to create an audio book containing speech.

I started doing research on Google - but all the articles I found contained so much technical gobbledygook – I was soon put off. So I went to my local music store for advice on what to buy. I decided to use my computer to create the audio books and this is what I bought:

1 microphone stand

1 pop-screen (that’s a piece of material that is placed just in front of the microphone to stop your “Ps” from popping)

1 studio microphone

1 software program (Wavelab)

1 USB Audio/MIDI interface (TASCAM US 122 with phantom power)

1 pair of heaphones

It all came to 650 euros (800) dollars.

I connected my Audio/MIDI interface (this is basically a really good sound card in an external case) to my computer using the USB cable provided. I then set up my microphone and attached the microphone cable to the MIDI interface. After installing the software, I was ready to go.

The results have been great and I find Wavelab software powerful and incredibly easy to use.

Some Audio Book recording tips

I first get my entire copy ready before starting the recording. I pin the sheets of paper with the text that I am going to read in front of me onto the wall. Then, at about 8 inches away from the microphone, I start to talk. The more natural you can be the more interesting you will sound to your listeners. I found that the best thing to do is to stand in front of the microphone and make gestures in the same way as you would when talking to a close friend. If you stand there stiff like a statue, you’ll come across in the same way in your recording.

Another thing that I like to do before starting the recording is to get myself into a really good mood. Again, this will add to the impact of your recording. I always listen to a few uplifting songs and get enthusiastic before starting. You should also try to make sure that you keep the same distance from the microphone.

And that’s it – I hope that this article will save you a little bit of time setting up your own home recording studio and I wish lots of success with your audio books.

The author of this article is Alan Twigg. My business is Playtime books, which offers new and contemporary audio books for the 3 to 10-year-old age group. You will find this site at http://www.playtime-books.com.Article Source: http://EzineArticles.com/?expert=Alan_Twigg

By: Kevin Rockwell

Getting the most out of your digital video camera can mean being able to create some really cool stuff. You just have to step outside the manual a bit and find the cool things you can do with your digital video camera and your editing software.

We have all seen them in a movie or a TV show, those very cool shots where they speed up time and capture a long segment of time and condense it into a very short amount of video. My very favorite example of this technique was an arty movie of many years ago that was called Koyaanisqatsi. (view trailer) In that movie they had some very interesting segments where they did time lapse effects to show driving on a bridge, flowers growing, clouds flying by and so on. Another example is many of the TV news stations nowadays have a camera that captures the day’s weather and then they process it down to a 20 second clip to show the clouds and weather racing by on screen.

Well this technique is not just a tool in the hands of the movie makers or the big TV stations. You can do this with your digital video camera gear too. I will go into two ways that you can accomplish this effect and get some cool results for your next video project. This one is worth playing around with in order to find the right settings to get the most dramatic effect.

Technique number one is to use the camera itself to do the time lapse recording for you. Almost all digital video cameras have the ability to do an interval recording. What this means in a nutshell is that you tell the camera how long you want to record for and how long in between recordings and it will go on autopilot for you for as long as the battery lasts or the tape runs out. This is what those cameras at the convenience store do, they record a few seconds of motion every 30-60 seconds giving the overall view of the traffic in the store over time.

Now if you want to capture some time lapse in your digital video camera you will need to get into your cameras menu and find Interval Recording (or in my case Int Rec, as I use a Sony PD 150 for my camera) When you select this option you will decide how long of an interval between shots you want and how long to record each time. If you are trying to capture something that takes a long time to occur and in which not much happens quickly you will want to set the interval at around a minute and the record time as short as possible on your camera. An example would be if you wanted to record a day in the life of a flower or the clouds rolling by in the sky. Suppose however that you want to capture an event that has lots of action and occurs over a much shorter time frame. Then you would want to shorten the interval between recordings and increase the time of each recording. So in this case you might record every 15-30 seconds and record up to 2-3 seconds of video each time.

I used this technique to capture an afternoon of work being done by a team of carpenters on my house remodeling project. The result was a flurry of activity as workers raced hither and yon nailing boards, carrying equipment and building walls. I have added it to my photo collection of the project. (Hey I had to live through the project so I might as well have a great record of it for posterity!)

Now suppose you have one of the great software video editing packages on your computer to work with your digital video camera. Now you can do it in post as they say in the business. You can record any length of video you want (subject to the limitations of your tape length) and then import it into your editing program.

Sidebar:

I use Adobe Premiere Pro for my editing jobs, but I have also used Avid DV Express, Final Cut Pro, and others in the non linear editing world. These are all great programs and are very powerful products that can create some very professional looking videos. You don’t have to have these products to create your own videos but if you are serious about digital video editing it might be a good idea to take a look at these options.

I digitize my raw video of the scene I am doing time lapse on into my computer (big hard drive, video eats up GB’s of space) and then import the clip into my time line. From th3e timeline you can then select the clip with a right click. From there you will be given a menu with options depending on the software you use. Select the option that says “duration”, “speed” or something similar. Change the speed of the clip so that time will speed up considerably. If you have an hour of video in the clip and want to shorten it to 2 -5 minutes then you need to increase the speed of the clip to 3 or 4 thousand percent of normal. This will require your software to render the clip at the higher speed and may take some time top process depending on the speed of your computer.

Once you have rendered the video clip at the new speed you will want to play it to see if the movie flows evenly or if you will want to readjust the speed setting to make it better. Sometimes you may want to shorten your raw video and adjust the speed down somewhat in order to get a smooth flow of action. Once you have rendered the clip at the new speed you can now cut and splice it as you see fit with the speeded up action intact. There are some things you will record that might only need a slight speed change, take for instance some digital video of your kids playing sports. Double or triple the speed of the clip and show it to them and you might have them rolling on the floor.

You can also use these techniques to capture the growth of a flower or plant over the course of days or weeks. Simply set you camera in exactly the same place at the same time each day and record an interval that works each day fro however long you want to document. May be you get the seedling just breaking soil and follow it all the way through turning into a full grown plant.

Another interesting idea is to capture the path of the moon across the night sky. Set up your camera on a tripod in a spot that can see the path of the moon for several hours. Set the camera to interval record and put the moon on one side of the frame so that it will pass across the frame as the night passes. This one may require some testing in order to get the exposure and framing right as well as the right interval to record at. Most likely you would want to set the interval as long as you can and the record time as short as you can but do a test run first to see what works.

I can’t stress enough that using your digital video camera can be great fun and you can achieve some cool results. Play around and test. You just might find yourself creating some very creative digital video to share with the rest of the world.

Kevin Rockwell worked as a network TV cameraman for 20 years shooting news and sports. Now a devoted fan of digital photography and video he works to gather information, tips and news for digital camera users. Oh and he loves to shoot pictures of cool and interesting things all the time.
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