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ARSCLIST  May 2007

ARSCLIST May 2007

Subject:

Re: Studio Acoustics (was Cedar)

From:

Don Cox <[log in to unmask]>

Reply-To:

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

Date:

Fri, 25 May 2007 14:09:36 +0000

Content-Type:

text/plain

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text/plain (81 lines)

On 24/05/07, Richard L. Hess wrote:

> In commenting on Tom Fine's and my exchange about the audibility of
> Cedar artifacts in commercial releases, At 06:52 AM 2007-05-22, Don
> Cox wrote:
>
>> Most computers have fan noise which would make it hard to hear the
>> ambience on a record.
>>
>> And there is the question of what monitors are being used.
>
> This raises an issue which has only been marginally touched on in
> this list and I fear with all the other cost and time pressures
> perhaps does not receive proper attention.
>
> Good room acoustics (as well as audio monitor selection) are crucial
> in doing a good job of restoration and mastering. They are less
> important for doing preservation copies where no processing involving
> operator judgment is performed, but they are still important so you
> can hear if you have optimum playback.
>
> While all of us may have our favourite monitor speakers, a recent
> series of tests about the Studer A80/A810 and Sony APR-5000 tested
> more than the audibility of differences among these three machines.
> It also showed that audibility of subtle differences can be discerned
> on three good monitor systems of VERY different design/implementation.
>
> I have a 5.1 arrangement with Mackie HR-824s and an Energy subwoofer
> with a Blue Sky Bass Management Controller. My room was designed with
> the help of a major-league acoustician (but many compromises were
> made from the design, so I don't credit him). I have never owned a
> room/monitoring chain with better imaging. It matches the ITU/Dolby
> published geometry for 5.1 surround.
>
> My friend Don has a Blue Sky 2.1 personal system in an average home
> bedroom (I think there is carpet on the floor).
>
> Steve Puntolillo has a nice Tannoy monitor system in an acoustically
> designed control room.
>
> All three systems were useable - Don doesn't use the Blue Sky 2.1
> system for post production (he doesn't do anything but edit and has
> other systems for that) - even though they were very different.
>
> Part of this shows how we adapt to our own monitoring environment(s),
> I think. Last fall, Don and I spent a good day listening to stuff on
> his Blue Sky personal monitor and it was wonderful -- partially
> because we were using it very near field, shutting out the rest of the
> room.
>
> Since I've built my studio, I've found I haven't used my AKG K-240DF
> headphones at all. I can hear more over the Mackies in the new room
> than the headphones -- this was not the case in my old room in
> Southern California.
>
> As to computer ambient noise, I have solved my challenge in that
> regard by having the fans "speak" to a foot-thick high-density
> mineral wool wall. Nothing reflects back from that. With both
> computers on, the room meets (or exceeds) NC-25. Depending on how
> much gear is on, and how fast I run the supply/exhaust fans, this
> number is degraded slightly.
>
> The worst offenders are the Sony APR-5000 tape recorders which have
> noisy fans. I looked for the "Pratt and Whitney" label on them, but
> couldn't find one -- I do have some allegedly quieter Pabst fans
> awating installation...but they are a BEAR to swap.
>
> If you meant "monitors" in the computer monitor sense, yes CRTs can
> emit noises that are annoying. I don't find that with my LCD
> monitors, though I presume some could emit noises. Most CRTs for
> computer use don't have that annoying 15,734 Hz tone that TV monitors
> have. I think I have a permanent notch at that frequency!
>
I was thinking of monitor speakers - and the whole listening
environment, as you point out.

Regards
--
Don Cox
[log in to unmask]

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