In the following tests we check the drive's behavior when reading
scratched / defective audio discs. The test discs used were the ABEX series
from ALMEDIO.
- ABEX TCD-721R
|
Errors
total
|
Num:
2305532 |
|
Errors
(Loudness) dB(A)
|
Num: 55116 |
Avg:
-67.8 dB(A) |
Max:
-10.2 dB(A) |
|
Error
Muting Samples
|
Num: 5723 |
Avg:
1.1 Samples |
Max: 21 Samples |
|
Skips
Samples
|
Num: 0 |
Avg:
0.0 Samples |
Max:
0 Samples |
| Total Test Result |
76.1 points (out of 100.0 maximum) |
|
C2 Accuracy |
66.4 % |
Looking at the above graph and table, the error correction of the Q30A with
the specific test disc was average. The total error count is very high with
quite a few muted samples. There are also quite a few high level spikes with
the maximum reaching -10.0 dB(A). Fortunately, no samples were skipped. The
total test result is about average while the C2 accuracy score is low.
- ABEX TCD-726
| Errors total |
Num: 60 |
| Errors (Loudness) dB(A) |
Num: 11 |
Avg: -85.0dB(A) |
Max: -76.7 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 |
93.2 points (out of 100.0 maximum) |
| C2 Accuracy |
100.0 % |
The 726 test media dose not usually present many problems with the majority
of the tested drives. The Sony drive's performance with this disc was not perfect
but it was good nonetheless.
- 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
|
| SONY DW-Q30A |
5/5 |
5/5
|
5/5
|
0/5
|
0/5
|
With this test disc, the drive reported average performance, achieving flawless
reading with 3 out of 5 tracks.
- Summary
The SONY drive is an average drive when it comes to CD error correction.
