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
|