TSSTcorp CDDVDW SH-S203B SB04
[+] Buffer size: 2048 kB, read cache is enabled
[+] Supported read commands: BEh
[+] Testing cache line size:
no cache detected
HTOA supported
FUA not supported
Errors total tells about the total number of wrong stereo samples. This includes areas of wrong samples, that may include some correct samples.
The number errors measured in Loudness is the number of FFT analysis done. For that the average and maximum value tells the power difference of the two signals. No accoustic model is used for this calculation, so the audible error may differ from these values.
Muting tells something about error hiding. On bad errors (or bad error hiding techniques), the last error free sample is held for some time until a new valid sample is found. The number of these mutings are given as first result, following the average and maximum sample length of these mutings.
Skips are occuring when the sync was lost and the drive had to reposition again (and started on a slightly different position). Non-accurate stream devices would loose the sync very often and smaller and bigger skips occur (thus samples are missing or extraneous). The average and maximum values denote the length in samples of such skips.
The top half of the grid of the graph has the following means : The X position of a grid line is always a start of a new minute position on the CD (in play time, up to 74 min). The Y axis shows the dB(A) value of the error in the extracted file. The 0 dB(A) baseline at the top is marked slightly different. So the graph shows a range of 6 dB(A) down to -120.0 dB(A). Each line represents 6 dB(A) of volume (6 dB(A) louder means that the sound is double as loud).
The graph tells a lot about the abilities of the drive. The quality of the optical system (and/or of the error correction capabilities of the firmware) is shown in at which time index the error start. The error hiding qualities are shown when the wedge gets bigger. For example my Pioneer DVD drive will start error correction quite early (bad optics and error correction), but the corrected data will stay nearly always below -60 dB(A), which is nearly unaudible if it is surrounded by loud music. See in the previous picture the arrows that show these values (the arrows are not created by the analyser, they were added later manually).
Further the 5 scratches here were repaired nearly perfect, only 3 of them were not fixed 100%, and these spikes are really short and nearly unaudible (-54 dB(A) and -74 dB(A)).
The graph of that Pioneer and some other selected drives are shown below.
The bottom half of the graph:
The first graph (green) shows the total number of C2 errors reported by the drive. You can see if C2 errors are reported and if it matches with the error positions shown in the error graph.
The second graph (red) shows the number of reported C2 errors, but which are fully ok in the extracted WAV image. In some cases the drive is able to correct (or interpolate) the defective value to the original value. So this figure is usually not zero, this is fully normal.
The third graph (blue) is the most interesting of the three graphs. It shows how many errors in the extracted WAV file are not reported in a C2 error flag. On drives with perfect C2 reporting, this graph should be a flat zero line. But as most drives do not have perfect C2, it will show errors to an extend.
