Hi Rob,
Thanks for doing the comparison. I've had a quick listen and will
spend some more time studying what you've done tomorrow.
The mics have been a bit of an issue - I think I've mentioned
previously that one is a older pre CE/lead free production whilst the
other was of much more recent origin. Gain and frequency response is
quite different requiring an offset in record levels. I should be
receiving a second recent production mic in the next few days so
hopefully I should have a pair that is much better matched than at
present.
cheers
Paul
On 30/03/2008, at 8:53 PM, Rob Danielson wrote:
>
> Here's a comparison QuickTime movie I made in which I used no
> roll-off EQ but rather many bands of parametric EQ attenuating the
> frequencies that were exaggerated to my ear. Note that there is quite
> a bit of discrepancy between the channels which I also tried to
> compensate for. I also felt the mics are a bit dark above 5KHz so I
> tried to boost the high end a tiny bit too.
>
> 12mb (16/48K uncompressed soundtrack)
> http://www.uwm.edu/~type/audio-reports/posting-techniques/media/
> PaulJacobson_KookaCompareEQH263Lrg.mov
>
> 4mb (IMA4 compressed soundtrack)
> http://www.uwm.edu/~type/audio-reports/posting-techniques/media/
> PaulJacobson_KookaCompareEQH263IMA4.mov
>
> Rob D.
>
>
>>
>> 2c,
>> Lou
>>
>> On Saturday, March 29, 2008, at 02:41PM, "Paul Jacobson"
>> <<pj%40cutlerco.com.au>> wrote:
>>> Hi All,
>>>
>>> In a reply to an earlier email Dan Dugan mentioned the Feltcher-
>>> Munson loudness curve as an explanation as to why we are aware of
>>> more low frequency energy in recordings than which is apparent to
>>> the
>>> "naked" ear.
>>>
>>> I made some quick experiments at constructing an inverse
>>> differential
>>> FM curve last night based on a chart of FM curves. I've tried to
>>> base
>>> the EQ on the change of emphasis that results from a 60dB boost in
>>> volume. The results appear to be quite promising and seem to sound
>>> closer to how I perceived the environment when listening at normal
>>> levels. There is a significant amount of LF cut, however this is a
>>> gradual roll off to approximately -23db at 20hz rather than a steep
>>> filter applied at 100hz as I've used in the past. The amount of eq
>>> required still needs some work, but I thought I'd share the results
>>> of my first experiments anyway...
>>>
>>> <http://www.mactrix.com.au/files/recordings/EQTest.mp3>http://
>>> www.mactrix.com.au/files/recordings/EQTest.mp3
>>>
>>
>>
>
>
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