limiters based on optocouplers work different.
the sound is converted to light in the form of a led. Then a light
detector is used to convert it back to electrical. both the light
and the detector are built within one little chip. The result is the
loud is limited to the max of the brightness of the light and the low
volumes or dim lights are not changed. In effect it limits the loud
and does not change the floor. Overall it does limit the dynamic
range but does not distort the overdriven signal.
An optocoupler is a $2.00 solution that does work well at limiting
the loud without distortion but the loud signal will still appear
flat topped.
Rich Peet
--- In wrote:
> In a message dated 6/30/2003 10:47:48 AM Pacific Standard Time,
> writes:
>
>
> > But, it's probably time to revisit the subject as there
> > has been so much new equipment brought out since then. My feeling
is
> > some of the newer limiters are not that bad.
> >
>
> But don't all limiters raise and lower the "volume" as you are
recording so
> that constant background noise will be going up and down as
the "volume" is
> increased or decreased. I used limiters a lot several years ago and
regret it!
> The recordings are not good as the volume is constantly going up
and down as the
> bird sings...this being noticeable with the constant background
noise
> sounding like a wave!
>
> My best,
>
> John
> John V. Moore Nature Recordings
>
>
>
> [Non-text portions of this message have been removed]
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