9. Re: R-44 issue
Fri Jun 22, 2012 12:47 am ((PDT))
thanks, but these issues are, for want of a better way of putting it, sound=
pollution to the signal - as in additional sounds entering the sound & the=
se can't be overcome with LF filters etc.
If anyone would like to hear a short mp3 or wav of the fluttering & electro=
nic sound I can send them it.
--- In Philip Tyler <> wro=
> This may or may not help, I have a Sound Devices MixPre and when used wit=
h Audio Technica 3032 microphones it can end up almost 'motor boating'. Usi=
ng LF cut on the microphone or MixPre itself cures this problem. On the sou=
nd devices web site they acknowledge this and suggest the LF cut as the way=
around the problem. It can also help using the 15 volt phantom setting as =
> It was explained to me that the majority of microphones phantom power req=
uirements are constant current, variable voltage. But those mics which offe=
r a range of operating voltages tend to be constant voltage, variable curre=
nt (?) and these can stress the power supply. Which is certainly what happe=
ns in the MixPre case and is cured by applying bass cut or helped by using =
the lower voltage setting.
> There was a page on the sound devices site listing those microphones whic=
h caused problems, but I can't find the link to it.
> I don't know if that helps you or not?
> There was a thread I started about the AT3032 / MixPre problem some time =
> From: robin_parmar_sound <>
> Sent: Friday, 22 June 2012, 3:49
> Subject: [Nature Recordists] Re: R-44 issue
> Jez wrote:
> > I connected sets of DPA4060 mics & when testing with these there is an =
audible fluttering in low frequencies when connected to the R-44. Also some=
kind of electronic signal generated by the recorder is audible.
> According to my notes the DPA 4060 functions best at 48 =C2=B14V but can =
run on as low as 10V and draws around 0.5 mA. I would assume the recorder c=
an at least provide that much times two. So if the recorder has the same sy=
mptoms with only two mics connected we need to look elsewhere for the culpr=
> I would not be surprised if it was some strange grounding issue, perhaps =
related to how the shield of the socket and cable converter make (or fail t=
o make) contact. I am hardly an expert but recall reading something similar=
some years back, relating to the DAD6001BC.
> Odd indeed.
> -- Robin Parmar
|<Prev in Thread]
||[Next in Thread>|
- 9. Re: R-44 issue,
The University of NSW School of Computer and Engineering
takes no responsibility for the contents of this archive. It is purely
a compilation of material sent by many people to the naturerecordists mailing list. It has not been checked for accuracy nor its content verified in any way.
If you wish to get material removed from the archive or
have other queries about the archive e-mail
Andrew Taylor at this address: