Hi Gianni--
I agree the clock is faster and louder than would
be ideal. I'm realizing there are quite a few
factors to the testing method. I should probably
right some of them down. Emil did the test
several times to work out issues.
Nearly all of the QuickTime movie soundtracks I
make are full res .wav files. (indicated by "Lrg"
at the end of the file name). Anyone can open
just the sound from QT movies using a
QuickTime-compatible sound editing app. You can
also use QT Pro or MPeg Streamclip to export the
16/48K stereo or mono track with no quality
change/loss. MPeg Streamclip is a free,
cross-platform application that many people use
for such things.
Let me know if you run into issues. Its a useful
process to know how to do. Rob D.
At 9:03 AM +0200 8/23/10, Gianni Pavan wrote:
>Hi Rob, is it possible to download a .wav file
>to make the comparison with my own software
>(I'll send back the spectrographic images) ? The
>quicktime movie doesn't show well the
>background, and there is so little time between
>the tics/tocs I feel hard to hear the background.
>
>Gianni
>
>
>2010/8/18 Rob Danielson <<>>
>
>At 2:32 PM +1000 8/18/10, Paul Jacobson wrote:
>>
>>
>>
>>On 18/08/2010, at 12:43 PM, Rob Danielson wrote:
>>>
>>> Hi--
>>> An opportunity for interested ears:
>>>
>>> As he pondered which professional audio recorder to purchase for his
>>> surround recording needs using AT4022's mics, Emil Klotzsch conducted
>>> several comparison tests this summer including a Sound Devices 702
>>> recorder (same mic pre as the 744T) and a Tascam DR680. I compiled
>>> one of these tests into a 3.5 mb QuickTime movie which you can
>>> download and play on your computer with QuickTime or a QuickTime
>
> >> compatible player:
><<http://tinyurl.com/2flkpjk>http://tinyurl.com/2flkpjk><http://tinyurl.co=
m/2flkpjk>http://tinyurl.com/2flkpjk
>
>>>
>>> Maximum pre gain was used on both recorders. There were a few
>>> environmental sounds Emil was unable to eliminate in his urban
>>> located studio. Both recorders were operated on battery power for the
>>> test. Rob D.
>>
>>Hi Rob,
>>
>>These "tik tok" tests are fine for assessing relative self-noise,
>>but I am extremely skeptical about how much of value can be derived
>>from this kind of test in regards to other aspects of performance.
>>As I said to Myles, once you have a preamp sufficiently quite not to
>>degrade mic performance self-noise becomes an essentially irrelevant
>>factor. I know there is a predominance of "flat earthers" on the
>>list when it comes to preamps, but having built a few diy preamps
>>and heard the audible changes resulting from changing components let
>>alone, different designs it's hard to give any credence to claims to
>>the effect that a "all preamps sound the same".
>>
>>cheers
>>Paul
>
>Hi Paul--
>
>I trust you are hearing something that's important. I want to hear it
>too. Can you describe the differences in pre performance in terms of
>specific, audio qualities? As you well know, comparative
>"preciseness" and "clarity" can stem from a number of traits. Tests
>can be tuned to foreground them.
>
>Its my understanding that with a test like this one, mic self-noise
>_remains_ the predominant factor. The "transparent" pres allow the
>mics to shine through in nearly full glory. But, understandings
>evolve.
>
>I have no prejudice except that if a piece of equipment truly
>produces important differences, we should be able to readily hear
>them. There are many details to account for in a comparison test like
>Emil has made and I'm pretty confident that his test conditions
>present ample opportunity for several kinds of difference to surface.
>
>I often sense phenomena that seem palpable that I can't adequately
>describe. When I narrow my focus, my goal is to hear it, to dis-cover
>it, if I can. If I can't, I can't. The opportunity usually resurfaces
>if there is some _thing_ to it. Rob D.
>
>--
>
>
>
>
>
>
>
>
>--
>Centro Interdisciplinare di Bioacustica e Ricerche Ambientali
>Universit=E0 degli Studi di Pavia
>Via Taramelli 24, 27100 Pavia
><http://www.unipv.it/cibra>http://www.unipv.it/cibra
><http://mammiferimarini.unipv.it>http://mammiferimarini.unipv.it
--
"While a picture is worth a thousand words, a
sound is worth a thousand pictures." R. Murray Schafer via Bernie Krause
------------------------------------------------------------------------
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/naturerecordists/
<*> Your email settings:
Digest Email | Traditional
<*> To change settings online go to:
http://groups.yahoo.com/group/naturerecordists/join
(Yahoo! ID required)
<*> To change settings via email:
<*> To unsubscribe from this group, send an email to:
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/
------------------------------------------------------------------------
|