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EAN-130884088580742   EAN-13 barcode 0884088580742
UPC-A884088580742   UPC-A barcode 884088580742
Product NameHal Leonard 393162 Andy James' Shred Guitar in 6 Weeks, Week 5 DVD
CategoryElectronics / Photography: A/V Media: Movie
Amazon.comA Buy on Amazon ~ B004W7D1S0
SKUS884088580742
Price New12.52 US Dollars    (curriencies)
Long DescriptionWelcome to the Shred Guitar in 6 Weeks guitar course. This course is designed to focus your practice towards realistic goals achievable in six weeks. Each week provides you with techniques concepts and licks to help you play and understand metal soloing at a manageable pace. Licks in the style of a featured artist are taught each week to help you towards playing in real musical situations and develop an ear for the differences between players. If you have been frustrated or intimidated by other educational material this course is for you. You will see the improvement as you work through each week. Week five includes: Pentatonic scale and blues scale in the fifth position Û licks and sequences in the fifth position Û natural minor scales and sequences Û extended arpeggios Û and four licks in the style of Yngwie Malmsteen. Andy James is a well respected guitarist and teacher whose influences include Greg Howe Paul Gilbert Tony Macalpine and Zakk Wylde. He is known for his blistering technique.
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Created05-25-2013 12:06:52am
Modified05-22-2019 10:03:37pm
MD5139d3c2c4a15aa835aea3010738b83d3
SHA2569883a95247c261467b539c11312a450f096b69d03c06d03408c41a0759d9c65e
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Barcodes are a graphical representation of information that can be easily read by machines. People read text easy enough but machines find this to be too complex so we use barcodes to simplify the process.

Barcodes can store numbers, letters and all the special characters. What can be stored in the barcode depends on which type of barcode is being used. But the basics of how a barcode works is the same regardless of what type of code it is, what information is stored in the barcode or what type of scanner is being used.

barcode scanIt all starts with the scan. The scanner, regardless of which type you are using, will examine the barcode image. The lines (or blocks in the case of 2D barcodes) will either reflect or absorb light. When we look at the barcode, we tend to see the dark stripes and think of those as the important parts. Those are the parts that absorb the light and the white parts reflect the light. So the scanners tend to see the barcodes in reverse of how we think of them. But the dark and light portions of the code on their own don't automatically become the information stored in the code. In most cases, it is the relative placement and size of each dark and light stripe (or block) that make up the information. There are also special markers that help the scanner know which direction the barcode is facing when it is scanned. This allows the scanning process to work even if the barcode is upside down when it is scanned. The scanner simply processes the scanned data in reverse in this case.

barcode oscolloscopeTaking a look at an oscolloscope screen as a scanner passes over barcode, you can see that the stripes reflect back light and the scanner registers the changes as high and low levels. So what looks like a simple image is really a rather complex set of layered encryption to store the data. The encryption isn't done to hide the information in this case. Instead it is done to make it easy for the machine to read the information. Since the base language of machines is binary (1 and 0) it is easy for them to read this type of information even if it takes several steps to turn this back into something that people can understand.

binaryThe size of each high and low are combined to make binary data. A series of 1 (one) and 0 (zero) values which are strung together then decoded into the actual information. Up to this point, the process is the same for all barcodes regardless of how they are stored. Getting the lines or dots into binary is the easy part for the machine. The next step is to make this binary code into something useful to people. That step depends on  which type of barcode is being scanned. Each type of barcode has its own encoding methode. Just like human languages, what seems to be two similar words (or barcodes in this case) could actually be two very different values even though they have the same basic letters (or bars).

So you can see that the scanning devices need to know not only how to turn the bars or dots into binary, but after they have done that they need to know how to turn that binary string into the original information. But regardless of the encoding process the basic steps are the same. Process the light and dark areas, convert them to binary, decode the binary, pass the information on to the receiving device which is normally a computer program of some sort.

Once the decoded data reaches the computer program, there is no telling how the information is to be used. The grocery store will use the information to keep track of the products you purchased as you go through the register. A manufacturer will use the code to identify where they are storing their parts. And shipping companies use the codes to keep track of the packages they are delivering.

Now that you know a little about the mechanical portion of the process, take some time to learn about the different types of barcode scanners and the different ways the information can be encoded into barcodes.

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