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Home > Hardware Reviews > Optical Storage > DVD External

Tuesday, June 29, 2004
Memorex True 8Xn

3. CD Error Correction Tests

Memorex True 8Xn external DVD±R/RW Recorder - Page 3

CD Error Correction Tests

In the following tests we check the drive's behavior when reading scratched / defective discs. The test discs we used are the ABEX series from ALMEDIO.


Errors total
Num: 3499144
Errors (Loudness) dB(A)
Num: 126824
Avg: -72.4 dB(A)
Max: -9.6 dB(A)
Error Muting Samples
Num: 10844
Avg: 3.2 Samples
Max: 1005 Samples
Skips Samples
Num: 31
Avg: 48.2 Samples
Max: 642 Samples
Total Test Result
58.9 points (out of 100.0 maximum)

The Memorex drive performed poorly with the ABEX TCD-721R. The total error count of 3,499,144 is very high as are the mutting samples and skipped samples. The maximum error (loudness) level of -9.6 dB(A) is also very high.. The total test result score of 58.9 points is very poor.

- ABEX TCD-726

Errors total
Num: 359249
Errors (Loudness) dB(A)
Num: 25523
Avg: -79.3 dB(A)
Max: -13.1 dB(A)
Error Muting Samples
Num: 1680
Avg: 5.2 Samples
Max: 1005 Samples
Skips Samples
Num: 5
Avg: 34.8 Samples
Max: 66 Samples
Total Test Result
66.1 points (out of 100.0 maximum)

The Memorex drive had poor performance even with the ABEX 726 disc, logging in a total result score of 66.1 points.

- CD-Check Audio Test Disc

The CD-Check Test Disc is a very useful tool for evaluating the Sound Reproduction / Error correction capabilities of a CD player. The disc offers a signal combination with disc error patterns to rate the drive's abilities to read music and reproduce it completely. Five tracks on the disc contain a sequence of progressively difficult tests. These tracks are referred as Check Level-1 through Check Level-5.

The files are reproduced (played) through a software multimedia player (i.e. Windows Media Player). Each level is considered as passed, if the tone coming out from the speakers is smooth, continuous without interruptions, skipping or looping. The higher the Check Level passed, the more reliable the sound reproduction of the tested device.

Error Level
Memorex True8Xn

The drive passed only the first two Check Levels of the test. The performance reveals less than average sound reproduction and error correction. The fifth level includes an error size of 1.500mm, and the drive produced many audible clicks.

- Conclusion

Test Disc
Reading Speed
Average Score

The drive offers poor error correction with CD media. The final average score of 62.5 out of 100 is very low indeed.

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