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Re: Edirol R-09

Subject: Re: Edirol R-09
From: "Klas Strandberg" klasstrandberg
Date: Sat Aug 19, 2006 3:22 pm (PDT)
I have a new design which is promising. I'll come back here when evaluated=

better.

If a person can use a common ECM, it depends...
The 2SK1227 IC which I have used for a long time, is used in many "common"=

ECM's. It doesn't work.
Other ECM's might work,  it depends....
Some PIP mic's will work, others not. It is not a question of quality or pr=
ice.

I'll see tonight if I can get an answer to your question on phase interfere=
nce.

Klas


At 16:44 2006-08-19, you wrote:
>Klas--
>So the average user couldn't use mics like your
>em-23's or popular ECM's with as-is? It seems
>like you work-around is a custom ECM mic.
>
>Is the phase interference in monitoring more evident when using high gain?
>
>Very interested in your opinion of the pre noise and gain performance.
>
>Rob D.
>
>   =3D =3D =3D =3D
>
>At 2:06 PM +0200 8/19/06, Klas Strandberg wrote:
> >Never a dull moment!
> >
> >At four this morning I was near giving up with the Edirol 09 Plug In Pow=
er!
> >I decided to make another attempt with a 20 year old, very conventional =
FET
> >transistor impedance converter / amp.
> >It worked!
> >
> >The Edirol 09 PIP works okay if you draw very little current from it.
> >Preliminary conclusion: When the mic is connected, you must have a at le=
ast
> >2,4 v at the input / channel + (of course) - a low noise microphone.
> >
> >It's similar to the problem with the Sony High MD's: But here, the probl=
em
> >was that the PIP voltage went down below 0,6v when you connected a
> >microphone with a modern FET-IC, like 2SK1227.
> >I find it somewhat strange  that you have to go 20 years back in time to
> >meet the modern mic input requirements and make them work!!!
> >
> >But never a dull moment.
> >
> >The "harmonizer" effect is a anti-phase mix which take place only when
> >monitoring. When monitoring a sine wave for example, one channel only, y=
ou
> >can vaguely hear the tone in the other channel too, but phase distorted.
> >The recording is okay.
> >
> >Klas.
> >
> >   et At 20:47 2006-08-18, you wrote:
> >>You are priceless, William, lots of hints! Thanks.
> >>My only comment is that I tried the low setting once, but then I got to=
o
> >>low input.
> >>Remember: I try it for naturesound recording only, and the sound pressu=
res
> >>present.
> >>
> >>Klas.
> >>
> >>At 18:31 2006-08-18, you wrote:
> >>  >There's an update of firmware from 1.02 to 1.03 on the Edirol web
> >>  >site.  The link is:  http://tinyurl.com/kj5ad
> >>  >
> >>  >Leonard at Sonic Studios is preparing a review of the R-09.  He
> >>  >describes the R-09's preamps as "adequately quiet." You can read his
> >>  >work in progress at www.sonicstudios.com/r-09revw.htm
> >>  >
> >>  >As Rob D. suggests, the Taperssection.com site has a wealth of
> >>  >information.  The "Recording Gear" section has more than 600 posts
> >>  >about the R-09.  In general, owners are pleased with the small size,
> >>  >easy-to-use controls, low price, and lack of software bugs in the
> >>  >R-09.  Recordings of loud music concerts (the primary interest of th=
e
> >>  >Tapers Section members) sound good.
> >>  >
> >>  >The following information was gleaned from Tapers Section sources.
> >>  >
> >>  >1. Plug-in power is supposed to be 3.3v, but one owner measured only
> >>  >2.5v.  Perhaps this explains the poor performance of the Telinga mic=
s.
> >>  >
> >>  >2. If you set the recording gain below 8 you are attenuating the
> >>  >signal, all the way down to 0 which is 100% attenuated, no sound.
> >>  >Any setting above 8 is adding gain. A setting above 25 adds a lot of
> >>  >noise.
> >>  >
> >>  >3. Low Gain Mic-In and Line-In are almost the same noise and gain, t=
he
> >>  >difference is you can get plug-in power on the mic-in.
> >>  >
> >>  >4. Running the mic gain switch on high increases the noise a lot,
> >>  >particularly if you use the internal mics.
> >>  >
> >>  >To achieve less noisy results, try using mic low or line in with "ho=
t"
> >>  >(high output) mics. One user reports the Audio Technica 853 works we=
ll
> >>  >on line or mic low settings, with noise below -100db across the
> >>  >spectrum at 25 gain.
> >>  >
> >>  >5. When using line or mic low the last steps from 25 to 30 is where
> >>  >you get the most added noise, so run at 25 or lower, line or mic low=

> only.
> >>  >
> >>  >6. The R-09 uses standard SD flash memory cards (not the newer SDHC)=
.
> >>  >The largest SD card available today is 4GB.  The R-09 can't format t=
he
> >>  >4GB card, but if the card is formatted in a computer then the R-09 c=
an
> >>  >use its full capacity.
> >>  >
> >>  >Owners report the Transcend 4GB and Adata 4GB SD cards work properly=
.
> >>  >  The Patriot and PQI 4GB cards did not work after formatting in a P=
C.
> >>  >(Incidentally, 4GB cards like the Transcend cost less than $60 these
> >  > >days.)
> >>  >
> >>  >Recording two channels at 24/48 to a 4GB card =3D 4 hours of tracks.
> >>  >Recording at 16/48 =3D 6 hours. The R-09 can capture this as a singl=
e
> >>  >continuous recording if you need to. (Note, however, that many audio
> >>  >editing programs have a file size limit of 2GB.)
> >>  >
> >>  >7. The R-09 is powered by two AA batteries.  AA Alkalines last about=
 6
> >>  >hours, rechargeables 7 to 8 hours.  One owner reports 9 hours record
> >>  >time using Powerex 2500 mAh cells.  Lithium AAs will last longer
> >>  >still, but the R-09's battery meter doesn't report the battery power
> >>  >remaining properly with lithiums.
> >>  >
> >>  >8. The R-09 can be attached via USB cable to your PC or Mac, and fil=
es
> >>  >transferred without special software.  File transfer speed is very
> >>  >slow this way. Remove the SD card from the R-09 and plug it into a U=
SB
> >>  >card reader for much faster file transfers.
> >>  >
> >>  >--oryoki
> >>  >
> >>  >
> >>  >
> >>  >
> >>  >
> >>  >
> >>  >
> >>  >
> >>  >"Microphones are not ears,
> >>  >Loudspeakers are not birds,
> >>  >A listening room is not nature."
> >>  >Klas Strandberg
> >>  >Yahoo! Groups Links
> >>  >
> >>  >
> >>  >
> >>  >
> >>
> >>Telinga Microphones, Botarbo,
> >>S-748 96 Tobo, Sweden.
> >>Phone & fax int + 295 310 01
> >>email: 
> >>website: www.telinga.com
> >>
> >>
> >>
> >>
> >>
> >>"Microphones are not ears,
> >>Loudspeakers are not birds,
> >>A listening room is not nature."
> >>Klas Strandberg
> >>Yahoo! Groups Links
> >>
> >>
> >>
> >>
> >
> >Telinga Microphones, Botarbo,
> >S-748 96 Tobo, Sweden.
> >Phone & fax int + 295 310 01
> >email: 
> >website: www.telinga.com
> >
> >
> >
> >
> >
> >"Microphones are not ears,
> >Loudspeakers are not birds,
> >A listening room is not nature."
> >Klas Strandberg
> >Yahoo! Groups Links
> >
> >
> >
> >
>
>
>--
>Rob Danielson
>Peck School of the Arts
>University of Wisconsin-Milwaukee
>http://www.uwm.edu/~type/audio-art-tech-gallery/
>
>
>
>"Microphones are not ears,
>Loudspeakers are not birds,
>A listening room is not nature."
>Klas Strandberg
>Yahoo! Groups Links
>
>
>
>

Telinga Microphones, Botarbo,
S-748 96 Tobo, Sweden.
Phone & fax int + 295 310 01
email: 
website: www.telinga.com







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