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ARSCLIST  April 2012

ARSCLIST April 2012

Subject:

Re: Reducing crackle on 78s analogue and digital

From:

Ted Kendall <[log in to unmask]>

Reply-To:

Association for Recorded Sound Discussion List <[log in to unmask]>

Date:

Mon, 23 Apr 2012 09:13:50 +0100

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On 22/04/2012 18:04, George Brock-Nannestad wrote:
> From: Patent Tactics, George Brock-Nannestad
>
>
>
> Hello,
>
> I'll second Karl on his support to Tom's suggestion. Unfortunately, you
> cannot get those "cheap" CEDAR boxes any more, to my knowledge. There is one
> consolation, though: ELP, the Laser Turntable people, do now provide a
> one-knob noise reducer that seems to behave very much like the old CEDAR
> DeClicker. And it seems to be about on third of the original CEDAR box.
>
> I think that you would get at least 95% of the possible improvement, which is
> far more than some reissues provide you with.
>
> Best wishes,
>
>
> George
>
>
>> --- On Sun, 4/22/12, Tom Fine<[log in to unmask]> wrote:
>>
>>
>>> What about a situation like Jan's, where he wants to enjoy
>>> his 78's with less crackle? I'm surprised no one has built a
>>> preamplifier, intended for playback (but why not add a SPDIF
>>> or USB output so one could put their preferred playback
>>> sounds into their iPod or other portable digital system?),
>>> that includes real-time DSP. It seems you could license
>>> ClickRepair pretty cheaply (given the retail price to buy
>>> the software), so you don't need to go and spend a fortune
>>> on better-branded and more-detailed software. I'm talking
>>> about just for listening enjoyment, not for hyper-sensitive
>>> archival use. You'd have your EQ curves and hi-/lo-pass
>>> stuff in the analog realm, then go A-D with any of the many
>>> reasonably-priced chips available today, probably want a
>>> higher-than-CD sampling rate and definitely a 24-bit depth.
>>> Then apply DSP in real time and, for the listening system,
>>> go back D-A but also send the digital to a SPDIF transmitter
>>> and perhaps a USB interface, so a person could make a
>>> transfer of the output and/or feed their favorite DAC. You'd
>>> be able to adjust the parameters of the DSP via encoder
>>> knobs on the front panel. This may be anathema to analog
>>> diehards, but many less-brittle folks might appreciate and
>>> use a good execution of this concept.
>> I agree that it is a terrific idea. Several years ago I suggested something
>> similar to CEDAR. No response.
>>
>> I believe the key to understanding the situation can be found in your last
>> sentence. The purists want the entire chain to be analog. However, I
>> sometimes wonder about all of this. Consider the Tilson Thomas set of Mahler
>> LPs...now available at the bargain price of $749.99 Yet, were these not
>> recorded digitally? I have heard that they are on their second pressing. So
>> maybe the time is ripe for such a product for discs.
>>
>> Karl (who listens to his LPs and 78s by converting the analog to digital and
>> then running them through external CEDAR boxes (the "cheap" ones) and
>> turning the signal back to analog)
>>
>>
At the risk of being accused of self-promotion, I made and sold (and
still make when my arm is twisted sufficiently) many units of a box
called The Front End to transfer engineers and sound archives. This is
entirely analogue in operation and is pretty good on crackle - many use
it to good effect in combination with DSP. These days, one would
probably use Cedar from the off, but there are still some who insist
that the analogiue approach is inherently better - not a view with which
I neccessarily agree.

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