naturerecordists
[Top] [All Lists]

Re: Rob/Curt rig tried out

Subject: Re: Rob/Curt rig tried out
From: "Rob Danielson" danielson_audio
Date: Thu Jul 3, 2008 1:51 am ((PDT))
At 9:52 PM -0700 7/2/08, Dan Dugan wrote:
>  >> In the second recording you can hear a faint buzz on the right
>>>  chanel,
>>>  which occurs every 8 or 9 seconds - the first really noticable one
>>>  is at
>>>  30 secs - esp. in spectral view. I've tried to replicate it back home
>>>  with no success - any suggestions as to what is causing it - and no I
>>>  didnt have a mobile phone with me.
>
>The description suggests to me that the noise is when the MD recorder
>cranks up to dump its memory buffer onto the disc. MD recorders, at
>least my pre-Hi-MD machines, don't record to the disc continuously.
>The disc spins down between buffer dumps.
>
>I've experienced the sounds of the disc spinning up being picked up by
>my mics acoustically.
>
>Also I recall troubleshooting a machine where a buzz when spinning was
>created when the mic cable plug was touching the recorder case. When a
>bit electrical tape was put next to the mic jack to prevent the sleeve
>from contacting the case, the buzz went away. The owner called it his
>$150 bit of tape...
>
>-Dan Dugan
>

Hi Dan--
Did you happen to take a look at the sonogram of the noise?
http://ad2004.hku.nl/naturesound/RobD/First_Gully_Fulmars_R_Ch_ZipperNoise.=
jpg
The brief buzz is in the center.  There's also some break-up on the
same mic. The buzzes and break-up seem to be only on one mic and the
mics are 6" apart. Rob D.
--






<Prev in Thread] Current Thread [Next in Thread>
Admin

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: andrewt@cse.unsw.EDU.AU