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Re: ATRAC compression

Subject: Re: ATRAC compression
From:
Date: Fri, 12 Jul 2002 09:50:55 +0100
Timeframe for supporting discontinued products varies widely, depending on 
the specifics of the parts involved. We obviously aim to continue 
supporting products for their entire lifetime, but parts availability can 
impact that. As with most electronics manufacturers, certain parts ( 
particularly laser mechanisms for CD and MD ) are bought in from 3rd party 
suppliers. Occasionally these manufacturers will cease production on those 
parts, and then we can no longer replace them, but this has happened 
rarely during my time in the industry, and we usually have enough warning 
to be able to buy up a couple of years worth of parts. In pro-audio we 
assume our product lifetimes are much longer than in the hifi/consumer 
world, and so our planning is done on a much longer term basis. This is 
worth considering for everyone who uses consumer recording products, in 
that consumer manfuacturers are committed to extremely fast product 
cycles, with products rarely lasting longer than a year. If the product 
was cheap enough to start with then obviously this isn't necessarily a 
problem, but if you are looking for a long term purchase with support and 
parts availability guaranteed at least for a few years, you are much 
better off spending the extra bucks and getting a professional machine 
with all the added bells and whistles. The other issue with using consumer 
machines in a 'pro' environment, ie outside of their reccommended usage ( 
usually in the home ), also impacts on your warranty cover. I know of 
several consumer manufacturers who count any usage outside of 'leisure' 
activities as an invalidation of the warranty.

Matt Jarvis
Product Marketing Manager
Marantz Professional Europe
Kingsbridge House, Padbury Oaks, 575-583 Bath Road, Longford, Middx, UB7 
0EH, United Kingdom
+447796610410 - Mobile
+441753686080 - UK Office
+441753686020 - Fax






Walter Knapp <>
2002-07-11 18:32
Please respond to naturerecordists

 
        To:     
        cc:     (bcc: Matt Jarvis/LGD/CE/PHILIPS)
        Subject:        Re: [Nature Recordists] ATRAC compression
        Classification: 



 wrote:
> 
> Music recording is definitely a major part of our recording business,
> although that is more in terms of rack mount products. In portables , we
> sell to many, many different markets, and the ones that tend to dislike
> ATRAC are the speech and language recording professionals, linguists,
> speech therapists, forensic scientists etc. particularly those who
> undertake detailed computer analysis, because any kind of compression 
can
> leave artefacts in the recorded material , not necessarily audible but
> which affect this kind of analysis work.  In Marantz's defence we have
> been supporting and manufacturing cassette portables for over 20 years ,
> and even if we do stop manufacturing MD at some point in the future, we 
do
> continue to support all of our discontinued products.

Over the last couple years I've had extensive contact with several
speech specialists. In all cases they were picking my brains about ATRAC
and the HHb Portadisc considering getting one for their work and
contacted me as I was one of the first ones with a Portadisc. Every one
eventually bought a Portadisc, and have been delighted with the
recordings. They have told me they have had no problems with analysis.
The only one I know to have problems managed to drop her Portadisc and
damage it. She did a lot of whimpering while it was off being repaired.
I think that these folks were previously using cassette recorders for
their work, though I did not ask.

The detailed analysis that these folks do is often not much different
than the sonograms we do. In fact most of the sonograms I've seen from
those groups look like pretty simple stuff which gives less info than
the stuff I use. Some of the other exotica they do can be really strange
and be dependent on custom, calibrated equipment and therefore would not
use any general purpose recorder. Like any group they get stuck on
favorite equipment and techniques, often attributing special abilities
to it that are not so special.

I think ATRAC does so well because it does not try to bring selected
samples through, but synthesizes a whole new audio track from what
amounts to control data. That track is very little different from any
other D/A converter output. Many people get trapped into thinking
there's missing samples, and it does not work that way. You get a full
set of samples, they just are not the original ones, and may differ
slightly in their values. For most analysis software this presents no
problem, and in terms of numeric analysis is generally within the range
of error of the mic's and pre's used. The problems I've seen have mostly
been ones of clock sync, one of the new problems with the advent of
digital sampling. And that's not really a ATRAC problem.

I would expect that you have a stock of repair parts and would continue
to do repairs as long as the stock remains. I've not heard of any
manufacturer restarting the manufacture of parts just for repair stock,
so there's bound to be a limit. What sort of timeframe do you plan on as
far as parts for discontinued equipment?

Walt



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