At 8:36 AM -0500 7/14/06, Curt Olson wrote:
> I also appreciate your operational bottom line advice... to down
>shift to "Low Sens" when
>hitting full scale with level setting of <12.
>
>Curt Olson
Ditto! This is important info for Hi-MD recordists that I've not come
across before. As of today, I'm a Low Sens under 12 believer. Thanks
Richard! Rob D.
I updated the subject line to make it easier to search/locate. Here's
Richard's full explanation in regard to Graham's tests:explanation:
>X-Yahoo-Post-IP: 213.107.224.18
>From: "stoatwizard" <>
>Date: Fri, 14 Jul 2006 06:37:57 -0000
>Subject: [Nature Recordists] Re: HiMD Clipping Test results
>Reply-To:
>
>Graham,
>
>Looking at your results and the settings you had. I agree that on Hi
>sens you have clipping - indeed you have a tiny bit on the Low sens
>via the speakers too.
>
>The clipping is probably because you have too much electrical input
>level to the HiMD for the Mic-Hi sensitivity.
>
>If you are achiving 0dBFS with the recording level set to 11 or below
>you must lower the sensitivity of the HiMD or it will clip. That is
>assuming the gain profile of all HiMDs are similar to the NH700 I
>tested this on. At least the new RH1 seems to use the same chip. The
>measurement results are shown on
>
>http://www.wildlife-sound.org/equipment/himd/himdpklevels_meas.html
>
>The rule of thumb is reasonably easy to remember in the field - if on
>a HiMD you are getting near 0dBFS recording at a manual level setting
>of < 12 then change down a gear in sensitivity, otherwise you will
>suffer preamp clipping.
>
>This is independent of PiP powering issues, which mean you have
>to choose your mic carefully if you are using PiP. I tested a Sony
>ECM 719 which should work with a Sony MD and indeed it does - PiP
>settles at 1.5V, and my old Marantz ECM-8 settles at 1.2V. Both these
>are reasonably in spec. The OKMII and Rapid capsules, and probably
>Panasonic WM61 capsules would not run in spec with the Hi MD. But
>this was not at issue in your case as the original recording looks
>okay.
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