In the following tests we check both drives behavior when reading scratched / defective audio discs. The test discs used were the ABEX series from ALMEDIO.

- ABEX TCD-721R

Errors total	Num: 873740
Errors (Loudness) dB(A)	Num: 50130	Avg: -74.3 dB(A)	Max: -16.7 dB(A)
Error Muting Samples	Num: 2793	Avg: 1.2 Samples	Max: 161 Samples
Skips Samples	Num: 0	Avg: 0.0 Samples	Max: 0 Samples
Total Test Result	76.8 points (out of 100.0 maximum)
C2 Accuracy	99.7 %

Errors total	Num: 1080563
Errors (Loudness) dB(A)	Num: 53891	Avg: -73.7 dB(A)	Max: -14.9 dB(A)
Error Muting Samples	Num: 3430	Avg: 1.0 Samples	Max: 9 Samples
Skips Samples	Num: 0	Avg: 0.0 Samples	Max: 0 Samples
Total Test Result	76.6 points (out of 100.0 maximum)
C2 Accuracy	99.7 %

Both drives, but especially the LG had low total error counts while the average error loudness levels were also low. Both drives had 0 skipped samples and their total test result score of 76.8 and 76.6 ( LG and LiteOn respectively) is a good indication of their good performance. Both drives produced a good C2 Accuracy score of 99.7%.

- ABEX TCD-726

Errors total	Num: 69
Errors (Loudness) dB(A)	Num: 13	Avg: -84.2 dB(A)	Max: -65.2 dB(A)
Error Muting Samples	Num: 0	Avg: 0.0 Samples	Max: 0 Samples
Skips Samples	Num: 0	Avg: 0.0 Samples	Max: 0 Samples
Total Test Result	93.0 points (out of 100.0 maximum)
C2 Accuracy	100.0 %

Errors total	Num: 137
Errors (Loudness) dB(A)	Num: 10	Avg: -69.2 dB(A)	Max: -64.6 dB(A)
Error Muting Samples	Num: 0	Avg: 0.0 Samples	Max: 0 Samples
Skips Samples	Num: 0	Avg: 0.0 Samples	Max: 0 Samples
Total Test Result	93.5 points (out of 100.0 maximum)
C2 Accuracy	100 %

Very good results for this disc also although the best drives can produce test result scores of 100.

- 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 more difficult tests. These tracks are referred to as Check Level-1 through Check Level-5.

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

Error Level	1	2	3	4	5
LG GDR8163B	5/5	5/5	5/5	5/5	0/5

Error Level	1	2	3	4	5
LiteOn SOHD-16P9S	5/5	5/5	5/5	5/5	0/5

Both drives successfully passed four out of the five check levels for this test. This is very good performance since an average drive manages to play up to the third level while very few drives manage to read the fifth.

- Summary

Overall the error correction is good for both drives.