4. Sonograms of long recordings [was nature recordists group]

["Dan Dugan" dandugan_1999]

On Jan 24, 2012, at 4:09 AM, Volker Widmann wrote:

> Dan,
>
> that is great!
>
> Did you use Sonic Visualiser for that?

No, the 24-hour graphic I referenced is published by the Natural Sounds Pro=
gram Center of the National Park Service in Colorado Springs. They have sof=
tware that makes it up from =E2=85=93-octave data, rather than from audio d=
irectly. That process is a legacy of smaller memory capacity in the field--=
their automated monitoring stations used to record =E2=85=93-octave data co=
ntinuously and a few minutes of actual audio every hour. Things are differe=
nt now, but I don't think they have adapted the software yet to work with a=
udio files. I wish they would!

> Can you go more into detail about the parameters fiddled with?

If you get Sonic Visualiser I can send you the parameters I start off with.

> I think here a pictures tells more than listening to hours of sound.

It sure does!

-Dan