Jerry, thanks for your reply. I have used Plextools (which, for those
who do not know, works only with Plextor drives) before, and its
findings coincide with problems that mastering plants have
occasionally encountered with redbook masters I have sent them (now I
check first). But I have been frustrated with its lack of

But I love the page with freeware. Any idea of why there are no
software titles for the Mac?



On Thu, May 28, 2009 at 4:20 PM, Jerry Hartke <[log in to unmask]> wrote:
> DriveSpeed/CD-DVDSpeed/CDSpeed has been made available by Ahead Software for
> many years, as posted at together with
> other tools. This freeware evaluates error rates with many drives, and adds
> bit jitter with a few drives. These very limited results are certainly
> better than nothing, but cannot replace comprehensive testing for
> conformance with ISO and other standards.
> The problem with freeware is accuracy. A proper test system uses test drives
> that are selected for correlation with Philips and other standards. The use
> of ordinary drives may give severe errors in some drives that are not
> observed in others. This is because of different servos that do not respond
> the same to major defects.
> Also, bit jitter is usually too high for various reasons, and the results
> may fail a perfectly good disc. See
> for a brief outline and a description of available services.
> Jerry
> Media Sciences, Inc.
>> -----Original Message-----
>> From: Association for Recorded Sound Discussion List
>> [mailto:[log in to unmask]] On Behalf Of Marcos Sueiro
>> Sent: Thursday, May 28, 2009 10:28 AM
>> To: [log in to unmask]
>> Subject: [ARSCLIST] New CD Test software
>> Has anyone used this? It does look slightly friendlier than
>> Plextools....
>> Marcos

Marcos Sueiro Bal
Audio Engineer