Hi all and sorry for the very late response, I just haven't had time to ans=
wer.
So here is a sample of the recording: https://soundcloud.com/australiannatu=
resounds/gong-with-distortions
The photo shows the spectral analysis in which you can see the distortions.=
Note that at the loudest point the recording is still at -7.6 dB so it can=
't be the volume.
Also, I should mention that this is a sample of a gong and not a tibetan bo=
wl as I originally wrote. The reason I chose this sample is because the eff=
ect is much more prominent, however, I have had the same issue with singing=
bowls.
To answer some of the other questions, it was not the attenuation that was =
the problem. But moving further away from the gong and then increasing the =
levels in post worked well. So it could be that the max SPL was reached but=
I somehow doubt that because it wasn't really that loud.
Regards,
Eric
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On 27/10/2013, at 11:14 AM, Aaron L. Rosenblum <> wrote=
:
>
> Has anyone experienced ultrasound distortion with insect recordings? It s=
eems perfectly possible, and this summer I made a recording of a field at s=
unset that was positively alive with crickets and other buzzy things. The r=
ecordings have a loud buzz that was not audible IRL and doesn't seem to hav=
e come from any nearby equipment (there was a house A/C unit in the distanc=
e, and it's audible as you would expect). There seemed to be a certain amou=
nt of axis sensitivity to the distortion. I puzzled over it for a while and=
wondered what kind of electromagnetic potential insects have. But ultrasou=
nd having an effect on the mics sounds much more likely.
>
> Also, to the original post, I have certainly experienced clipping or dist=
ortion with loud signals while recording with my Tascam set in high sensiti=
vity mode (of three modes), with the more granular level control set pretty=
low to avoid (so I thought) clipping. The solution for me was to change to=
a lower sensitivity setting (the -20dB pad in your case, I guess) and then=
modulate the more granular level setting from there as need be.
>
> Aaron
>
> I once spent two months recording Tibetans in the Zanskar Valley and am n=
ow
> involved in ultrasound with bat recording. My guess is that it is ultraso=
und
> distortion in the mic or input stage from the percussive instruments. Thi=
s
> is not included in the spec of most mics.
> David Brinicombe
>
>
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