Re: More on scrolling spectrograms

["Peter Shute" pshute2]

I had a look at just one - the first one on the grebes page. The problem isn't 
so obvious when the horizontal scale is stretched out like that, and probably 
doesn't matter as much, but I think it's still there. The cursor speed doesn't 
seem even, but it moves across so quickly that it's hard to tell.

If I pause it, and drag the slider across at a slow but even speed, I see the 
cursor jumping by uneven amounts, and even pausing here and there. It's just a 
minor cosmetic issue when the scale is stretched enough that the cursor is 
always on the feature one's hearing anyway, but  I find it mildly distracting.

In my example recordings, where I'm only trying to point out which call I'm 
referring to, I used a more compressed scale, and found that the cursor often 
wasn't even on the feature that was playing at the time so I had to fix it.

I didn't test Raven much for producing my spectrograms because only the Pro 
version would handle the long recordings I intended to process, and that costs 
money. I think it has better control of the scales than some other programs 
though, so it might be possible to set a scale that matches the capturing frame 
rate for even cursor movement if desired.

From:   On 
Behalf Of chrishails50 
Sent: Sunday, 13 January 2013 10:56 PM
To: 
Subject: [Nature Recordists] Re: More on scrolling spectrograms



Peter,

I use Raven software to make a spectrogram and then Camtasia Studio as a screen 
capture package. I don't scroll them as it takes longer to load but I play 
samples. Lots of examples here:

http://www.wildechoes.org<http://www.wildechoes.org/>

No problems with jerkiness if the file is small, some problem with very high 
frequencies and Camtasia.

Chris

--- In 
<naturerecordists%40yahoogroups.com>, 
Peter Shute wrote:
>
> It's about a year since I asked here about methods of producing scrolling 
> spectrogram movies for Youtube. At the time, the only solutions I was offered 
> were to use screen capture software to capture the display of an audio 
> program like Audacity, etc, or Acousmographe, which can produce a Flash movie.
>