Hello,
Can someone identify de strange call in my last sample after 11 minutes.
Jos=E9
--- In "freitojos" <> wr=
ote:
>
> Here is another with a strange call after 10 minutes.
> Same place today.
> Regards,
> Jos=E9
>
> https://soundcloud.com/freitojos/t0700z-strange-call-and-bird
>
> --- In brini@ wrote:
> >
> > It is interesting how you get different aspects pointed out from differ=
ent
> > listeners.
> >
> > What I heard was enharmonic distortion (but not a lot) and I confirmed =
this
> > by listening at quarter speed and 1/16 speed, with audiograms and with =
and
> > without frequency filtering. Enharmonic distortion is at frequencies no=
t
> > related to the original signal and is much more audible at low levels t=
han
> > harmonic distortion. On a single note, several percent of harmonic
> > distortion is often inaudible. What we complain about is enharmonic
> > distortion when less than 1% can be unpleasant.
> >
> > The peak distortion near the end is slight and in practice inaudible as=
it
> > appears to be less than 1dB overload. When this happened, (before or af=
ter
> > digitisation) I don't know, but with many recorders, levels like this
> > trigger an automatic volume control giving a "hole" after the peak whic=
h is
> > a much more audible defect than a simple peak distortion.
> >
> > The answer, as ever, is to record low. I would advise aiming at peaks c=
oming
> > in at -10dB or -12dB below 100%. We are long past the era when you have=
to
> > cram everything on as high as possible to overcome tape hiss, but the h=
abit
> > sometimes lingers on. Plenty of headroom is essential with nature recor=
ding
> > where peaks cannot be predicted. Out of doors, natural noise will almos=
t
> > always swamp out any digital noise you will hear after lifting the play=
back
> > level to peak to -3dB or -6dB.
> >
> > Note about Blumlein recording (and ORTF etc). Any rig using spaced mics=
will
> > introduce phase shifts between left and right. This sometimes enhances =
the
> > stereo effect on headphones, but with open speakers, the image you hear=
is
> > very dependant on the room acoustics. The is why most studio mixes use =
level
> > stereo using pan pots rather than phase stereo to give a more predictab=
le
> > stereo image.
> >
> > David Brinicombe
> >
>
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