Main features
- Easy to use interface
- Verify option
- Fast extraction speed
- Audio data is displayed as a graphical waveform. The colors of this graph show the quality of the extracted track
- Audio play control buttons to manually verify the extracted wave file
- No need to install an ASPI manager in Windows NT/2000
CD DAE is freeware!
To start simply select the tracks and press the start button.
main
progress
1) Track position
2) Track selection
3) Audio play controls
4) Verified audio data
5) Unverified audio data
Color coding (% errors)
CD DAE verifies the quality by extracting the tracks twice and comparing the audio data.
During the extraction process the waveform is displayed.
The first time the track is extracted this waveform is displayed in grey.
When the track is extracted again to detect the errors, the color of the waveform shows the number of errors.
Here are a few examples:
Example 1
Errors: 0.00%
All green. The quality of the wave file is perfect.
There's no need to listen to the wave file.
Example 2
Errors: 0.01%
The yellow parts show that the wave file contains errors.
However, there are not many errors and the wave file sounds ok.
Wave files with this low number of errors sound fine in most cases but it's always a good idea to verify the quality by listening to the bad sections.
Note that CD DAE always shows the worst case. So even if there is only one error this will be shown in the graph.
Example 3
Errors: 37.51%
This is an example of a badly damaged track.
The worst part of this track is the orange part.
In this whole section there is a load static noise.
At the start of each red section a loud click can be heard.
Example 4
Errors: 92.67%
This track is very bad.
The whole file is full of pops, clicks and static noise.
You can still see grey lines from the first time the track was extracted which means that the drive returned different data the second time.
Error Correction
If errors are detected you should slow down the drive (in the main screen) and extract the tracks again.
If the tracks still contain errors you have to rely on the error correction of the drive.
When the drive detects errors, the bad samples are not returned.
Instead the average of the previous and the next error-free sample is returned.
If there are too many consecutive errors, the drive returns digital silence.
Note that not all drives use error correction with audio tracks. In this case the drive returns garbage and the faulty samples will be heard as load static noise.
Email
erik.deppe@pandora.be
Website
http://come.to/cdspeed