>> 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
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