2. Pulse-code modulation
Figure 3. The pulse-code modulation stream to digital signal to analog signal chain. An Introduction to Optical Media Preservation,
http://journal.code4lib.org/articles/9581
3. QC Tools for CD-DA
$30,000 - $50,000
● Audio Development
● DaTARIUS
● Expert Magnetic Corporation
$3,000 - $8,000
● Clover Systems
$0 - $25.00
● Plextools PlexUtilities
● QPxTools/Qscan
● OptiDrive Control
● Nero
● PXScan/PXView
4. IASA TC-04
Fig 1. Section 8.1: Accumulated errors in a CD-R over time
8.1.11.6.1 There are a number of
downloadable testers available online which
use a computer’s inbuilt CD/DVD drive to
measure error in written CD and DVDs.
However, due to the limitations of the
software and inaccuracy of the drives, most, if
not all, are unsuitable for archival purposes.
5. Plextor
The results of the tests may differ from system to
system, and should always be viewed in context, like
test environment, used hardware, software, media, etc.
6. QPxTool/Qscan
● open source
● compatible with many drives
● command line capability
● unlock Plextor features (firmware hack)
