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.
--
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