CD DAE Documentation

  Introduction

Main features
CD DAE is freeware!

  Usage

To start simply select the tracks and press the start button.

To retrieve information about the disc press the CD Info button. CD DAE first checks if the disc has CD Text information and then tries to get the information from the Internet through the freedb database.

The filename can be constructed with the following options:
%N: track number
%T: track title
%A: track artist

The default value is Track%N. This will results in filenames such as: Track01.wav, Track02.wav, etc.

After all the selected tracks are extracted, the average CPU usage will be displayed. A high value usually indicates a configuration problem which may cause bad results.


main



progress
1) Track position
2) Track selection
3) Audio play controls
4) Verified audio data
5) Unverified audio data

Color coding (% errors)

  Handling 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.

Advanced users: By adding the following value to the registry: Name: C2 Pointers, Type: REG_DWORD, Data: 0x01 you can enable the C2 Pointers option.
With this option there is no need to read the audio tracks again to check for errors.
Unfortunately not many drives support this feature correctly therefore it is recommended to use this feature only when you're 100% sure that your drive supports it.

 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 section there is a loud 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 loud static noise.

  Contact Information

Website
http://www.cdspeed2000.com