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Re: Edirol R-4

Subject: Re: Edirol R-4
From: Mike Feldman <>
Date: Thu, 24 Mar 2005 21:56:02 -0600
Cross-posting here.

Rob Danielson wrote on naturerecordists:

> Might be too early to conclude the R-4's mic pre quality is good 
> enough for the general sensitivity of "todays" mics.  Of course, 
> Volker's thunderstorm is not a good recording situation for judging 
> noise. Side-by-side comparison tests with known gear can be very, 
> very telling.  It could also be the R-4, like the R-1, is designed 
> more for music recording with a mic pre gain of 40dB compared to the 
> ~55-60dB we're used to with MD's. That would be consistent with the 
> Oades' report. Rob D.

I'm wondering if this would be a practical noise test for recorder:

Make up a set of shielded resistor mic dummy loads, say
dead short, 200 Ohms, 600 Ohms, 1000 Ohms, 4.7 kOhms.

Record a 10 or 20 second "gain control sweep" with each dummy,
crossed with each recording mode crossed with each input.
Maybe crossed with each power source and mic power option.

Anyone have favorite analysis software for characterizing the noise.


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