Digital-Recordings CD-Player Check
Our Price: AU $49.50 inc. GST each
AU $45.00 export price each
Product Code: DR-CD-Check
This item is listed in the following categories:
Test Discs, Navigation and Test CDs, Digital Recordings, Accessories, Test Discs, Accessories, Demo and Test Discs, Audio Gift Ideas
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Digital-Recordings CD-CHECK CD-Player Test Disc
Do CD Players reproduce 100% of recorded music? Not always. Errors created by the manufacturing process, as well as dust, scratches and fingerprints, send many CD / DVD players into a tail-spin, resulting in data loss and faulty sound reproduction. This manifests itself as poor stereo imaging, lack of clarity and transient response and dynamic-range distortions. In more severe cases it leads to audible clicks, muting, looping and skipping.
So, what makes one CD player better than other?
Many factors. But one important factor has to do with the player's ability to read data from the disc. CD players have built-in D/A converters that turn the digital data on a CD into an analog signal. Ideally, all the digital data should be converted to the analog format. In reality many factors cause digital data to be lost and sound reproduction to deteriorate.
CD players have a sophisticated error correction system that allows them to recover lost data. However when the data loss is greater than a system's recovery ability, some of the signal is lost. It is then that the CD player uses concealment methods such as interpolation, data substitution or signal muting to make this loss as inaudible as possible. This results in altered and often distorted sound.
Good players rarely resort to concealment methods when reading data from the disc. They will try to faithfully recover every error.
How to find out how well a CD player reads data?
Testing for data loss is normally a complex and time-consuming procedure that requires technical background and expensive equipment to perform. This product, the CD-CHECK compact disc, is quick and easy to use. For the first time, it allows evaluation of the CD player's "error correction headroom" (i.e. player's ability to correct data errors) and "tracking" (i.e. player's ability to stay on track despite of disc surface or other errors). It is inexpensive, quick and easy to use, and more effective in evaluation of tracking and data loss.
How does CD-CHECK work?
CD-CHECK uses special digital signals in combination with disc error patterns arranged over five tracks. The five tracks contain a sequence of progressively difficult tests referred to as Check Level-1 to Check Level-5. The higher the Check Level passed the more reliable the sound reproduction of the CD player. A smooth, continuous tone indicates the player passes that Check Level. Any clicks, interruptions, skipping or looping indicates failure of a Check Level. This is however not a determination of the sound quality of a CD player. Ultimately you must still use your ears.
How does CD-CHECK rate CD player's ability to read data?
According to CD-CHECK tests, a good CD/DVD player (i.e. passing at least Check Level-3) is able to fully
What are the specific uses of CD-CHECK?
List of audio magazines which have the Digital-Recordings CD-CHECK disc:
List of some audio manufacturers who have the Digital-Recordings CD-CHECK disc:
|Product Name||Price inc. GST|
|Manger Demo CD||$35.00|
|Granite Audio Ultimate Low Bass Test CD||$39.95|
|Granite Audio Phono Run-In and Test CD||$39.95|
|Granite Audio Workout and Fine Tuning CD||$39.95|
|Digital-Recordings Audio-CD Hearing Test||$49.50|
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