The reported 60 dB dynamic range for a mini-disc set to high sensitivity
seems too high from my experience. I was thinking it was around 45 dB,
limited by how loud a signal can be before the mic amp maxes out and
distorts.
Anyone know how this is measured? It needs to be measured from actual input
levels, not by assuming a line input standard level (1 v) and measuring how
far the noise is below that figure.
I will point out that my experience with mic input levels is confounded by
the relatively weak plug-in power of the recorder, and it might be that the
mics distort because of the PIP current drain rather than the preamp
flat-topping the signal. Also, I only use the 700 model, not the RH1, but I
think the inputs are identical.
Bruce Wilson
http://science.uvsc.edu/wilson
-----Original Message-----
At 9:15 AM +0000 1/3/07, Raimund Specht wrote:
>> In my experience with recorders, this is very
>> commendable performance for a low cost unit.
>>
>...
>
>> In your ratings of the performance of your Hi-MD recorder,
> > http://beale.best.vwh.net/measure/audio/MZ-RH1_Mic_30_150Z.htm to
>> which audio recorders are you making this comparison or "poor" and
>> "average?"
>
>I guess that these poor noise level and dynamic range ratings have
>been created automatically by the RightMark Audio Analyzer software.
>It seems that this software implies that one measures the LINE-IN
>performance only. However, a microphone input with a higher gain will
>always provide smaller dynamic range figures than a line input. So,
>for a high-gain microphone input, the dynamic range of 60.8 dBA would
>be quite good and we should just ignore the stupid "poor" and
>"average" attributes.=A0
>
>Regards,
>Raimund
>
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