2
Date: Mon Apr 14, 2014 1:18 am ((PDT))
Glad that works for you, Peter.
However, engaging a 20 dB pad right off the bat seems counter-intuitive. Bu=
t then you haven't given much info as to what gear is involved and how it i=
s connected.
BTW the cost of a Mixy unit exceeds the cost of a brand new SD702, which do=
es indeed appear to have mic preamps with a better noise floor.
But if I could get a Mixy preamp for under US $1000.00, I might be tempted =
to try it.
- Greg
From: peter <>
To:
Sent: Sunday, April 13, 2014 9:01 PM
Subject: Re: Re: [Nature Recordists] Small Recorder
=A0
I have the D50 and love it. Sure, it doesn=E2=80=99t have XLR inputs, but I=
use a Mixy field mixer and get the same quality (or better) than an SD.
My experience with hiss and self-noise when I=E2=80=99m not using the pre-a=
mp:
For starters, I always use the -20db pad setting. Input gain depends on the=
mics. Some microphones let me crank the input gain up all the way without =
generating hiss, others won=E2=80=99t let me gain higher than 6,5. In most =
cases, that is more than enough gain, even with the pad setting.=A0
Hope this is helpful.
Peter
On 14 Apr 2014, at 11:33 am, wrote:
> Also, is there a simple way to attenuate the microphone signal a bit, may=
be 6 to 12 dB, without worsening the self noise? I would like to run my M10=
at full gain since this is where Raimund's chart shows the preamp noise to=
be the quietest, but that is too much gain for the em172 under most record=
ing conditions.
>John,=A0
>
>Without knowing all the parameters, this is difficult to answer. The=A0
>solution is to test the mic and recorder using the pile of bedclothes test=
=A0
>method. This will give you an account of mic hiss which is usually the=A0
>annoying noise.=A0
>
>As you reduce the gain level, the mic hiss should reduce in proportion. At=
=A0
>the point that recorder input noise becomes louder on the recording than t=
he=A0
>mic hiss, then you are losing s/n ratio.=A0
>
>There is nothing you can do about mic hiss, so as long as it is swamping t=
he=A0
>recorder noise, you have the optimum record level with the maximum headroo=
m.=A0
>
>David Brinicombe=A0
>
>
"While a picture is worth a thousand words, a
sound is worth a thousand pictures." R. Murray Schafer via Bernie Krause.
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