Re: ...thoughts on sample size

Posted by Bink on December 05, 2003 at 17:08:22:

In Reply to: Re: Yamaha 6dB setting..thoughts on sample size posted by John Roberts on December 05, 2003 at 16:26:54:

: A sample size of one should be adequate to identify design issues like headroom (Yamaha 6dB situation?). It may not be adequate to evaluate tolerance related issues like accuracy of frequency centers. The odds of encountering a unit that is incorrectly assembled will be pretty low but drawing conclusions about typical accuracy from small samples could be questionable.

: As I think I mentioned in another post, headroom or signal handling capability of GECs needs to be tested in both boost and cut modes. Just like a console, it would be instructive to know what part of the signal path clips first. For example, if fader boost (cut?) comes out of headroom, this should be considered when setting input levels. I wouldn't expect all designs to be the same. Just like in console design headroom considerations often conflict with noise floor optimization.

Thanks for hanging in there with a consistent stream of good advice, John. It's a relief to know that our small sample sizes will actually mean something in terms of important things like headroom.

You bet we'll be boosting and cutting to see what happens. Be assured that precious little time will be spent with all faders at 0dB. This competition is for working EQs, after all.

-Bink

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Comments:
: : A sample size of one should be adequate to identify design issues like headroom (Yamaha 6dB situation?). It may not be adequate to evaluate tolerance related issues like accuracy of frequency centers. The odds of encountering a unit that is incorrectly assembled will be pretty low but drawing conclusions about typical accuracy from small samples could be questionable. 

: : As I think I mentioned in another post, headroom or signal handling capability of GECs needs to be tested in both boost and cut modes. Just like a console, it would be instructive to know what part of the signal path clips first. For example, if fader boost (cut?) comes out of headroom, this should be considered when setting input levels. I wouldn't expect all designs to be the same. Just like in console design headroom considerations often conflict with noise floor optimization.  

: 
: Thanks for hanging in there with a consistent stream of good advice, John. It's a relief to know that our small sample sizes will actually mean something in terms of important things like headroom. 

: You bet we'll be boosting and cutting to see what happens. Be assured that precious little time will be spent with all faders at 0dB. This competition is for working EQs, after all.

: -Bink



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