Rob Danielson wrote:
>> This happening with another PIP mic on HiMD could be consistent with
>> Curt's theory that something is going on with high level in using PIP
>> power on the HiMD mics pre.
John Hartog added:
> Perhaps it's the PIP, but recall last time this came up Curt Olsen
> reported the problem still occurring when he powered the mics
> externally and using the line-in. He also reported an inline -10db pad
> did not help either. However, he did suggest that using a Sound Pros
> SP-SPSB1S battery module with bass roll-off did correct the problem.
>
> Klas's suggestion of -20 db attenuation before the input of the
> recorder is worth trying: perhaps the -10db that Curt tried was just
> not quite enough. What size resistors would I need, and where should I
> connect them?
In other tests I ran, no amount of simple attenuation helped (such as
setting "mic sens" to "low" and turning the input way down). Since I
was able to duplicate the problem from the line input, I suspect the
weak link to be either the final line driver or the ADC (ADC seems the
more likely culprit to me). The only reliable solution I've found is
some amount of bass roll-off (obviously as little as possible).
Curt Olson
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