[MarcoM]

In an audience recording of mine (Zoom H4 with AT853 mics) I have (using
Cool Edit) a difference between positive and negative peaks (negative
greater than positive). What is the cause and how can be corrected?
Thanks
Marco

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[Deputy Dumbya Dawg[_4_]]

"MarcoM" wrote in message
...
In an audience recording of mine (Zoom H4 with AT853 mics) I
have (using Cool Edit) a difference between positive and
negative peaks (negative greater than positive). What is the
cause and how can be corrected?
Thanks
Marco



Real life is the cause. That is how sound pressure waves in
the air hit the mic element and modulate it. It does not need
correction.

peace
dawg

[Carey Carlan]

MarcoM wrote in news:VkHZh.22629$uJ5.411306
@twister2.libero.it:

In an audience recording of mine (Zoom H4 with AT853 mics) I have (using
Cool Edit) a difference between positive and negative peaks (negative
greater than positive). What is the cause and how can be corrected?

That's natural and you don't correct it.

Many instruments, brass in particular, have asymetrical wave forms.

[MarcoM]

Carey Carlan, 01/05/2007 15.52:

That's natural and you don't correct it.

Many instruments, brass in particular, have asymetrical wave forms.

Yes, it's ok for me, the sound is good. But most of the live recordings
I (and not only I) made have more similarity between positive and
negative peaks.
I made a test, now: I set the controls in a lower value and now the
difference is gone.
Probably the difference can indicate a clipping?
Marco

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[Mike Rivers]

On May 1, 9:33 am, MarcoM wrote:
In an audience recording of mine (Zoom H4 with AT853 mics) I have (using
Cool Edit) a difference between positive and negative peaks (negative
greater than positive). What is the cause and how can be corrected?

Sometimes that's natural, but it's possible that there's a design
defect in the recorder. Try it under a controlled condition. In a
fairly dead room, record a few distinct hand claps a foot or two away
from the mics. Take a look at that waveform.

It should be composed of predominantly positive-going spikes. If so,
then your recorder is fine and you're seeing a natural affect of room
reflections. If they're predominantly negative-going, then your
recorder is build backwards.

Often the acoustic polarity doesn't matter, but sometimes it does.
Since you're looking at waveforms, you obviously have a DAW of some
sort. Try inverting the polarity of the waveform and listen to the
playback. If it sounds better, save it that way. If not, don't worry
about it.

[MarcoM]

Mike Rivers, 01/05/2007 16.31:

Sometimes that's natural, but it's possible that there's a design
defect in the recorder. Try it under a controlled condition. In a
fairly dead room, record a few distinct hand claps a foot or two away
from the mics. Take a look at that waveform.

It should be composed of predominantly positive-going spikes. If so,
then your recorder is fine and you're seeing a natural affect of room
reflections. If they're predominantly negative-going, then your
recorder is build backwards.

The positive spikes seem to be lightly predominant, recording some claps
in my bedroom (not a perfect dead room...).

Often the acoustic polarity doesn't matter, but sometimes it does.
Since you're looking at waveforms, you obviously have a DAW of some
sort. Try inverting the polarity of the waveform and listen to the
playback. If it sounds better, save it that way. If not, don't worry
about it.

I try to listen to an inverted sample from my last recording, it seems
to be very difficult to hear differences between the original and the
inverted track.
Thanks for your help, it was explained in easy way for my
not-professional experience, so my recorder seems to work correctly.
Marco


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[Ty Ford]

On Tue, 1 May 2007 09:33:41 -0400, MarcoM wrote
(in article ):

In an audience recording of mine (Zoom H4 with AT853 mics) I have (using
Cool Edit) a difference between positive and negative peaks (negative
greater than positive). What is the cause and how can be corrected?
Thanks
Marco



Don't sweat it. Humans are asymetrical by nature; some have higher positive
peaks, some more negative. I have higher negative peaks (provided I'm
recorded pin 2 hot).


Regards,

Ty Ford



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