[linux-audio-dev] Project ideas?

[Dave Phillips]

Hi Jussi:

  I've seen realtime waterfall spectral displays, they're a bit more 
than 3D versions of the spectrograms produced by HASAS or baudline or 
any other Linux spectrum analyzer. The signal is represented as a 
constantly changing display, with colors indicating frequency intensity, 
and dying away after appearing (as opposed to remaining static,  
obscuring subsequent frequencies with perhaps less intensity). Again, if 
you looked at the images for Spectrogram and Cspect you can see exactly 
what I'm talking about.

  Snd produces a beautiful OpenGL spectral display, but it is a 
non-realtime display. Bill S. indicated that there was a way to make it 
work in realtime, but when I tried it I discovered that my machine 
really wasn't able to keep up, and the display did not include the 
fading effect described above.

  Btw, I apologize for not knowing the exact vocabulary to describe 
exactly what it I want, but again, look at the images for Spectrogram 
and Cspect, then imagine them in a rolling display, and that should give 
the idea.

Best regards,

dp


Jussi Laako wrote:

>On Tue, 2004-06-08 at 21:29, Dave Phillips wrote:
>
>  
>
>>Yes, along with display controls (perspective, colors, threshhold, etc).
>>
>>Which ones ? Stanko Juzbasic began a port of Allan Peevers' Spectrogram 
>>using XForms and OpenGL, but I'm not sure if it ever actually ran on a 
>>Linux system. Many spectrum analyzers exist for Linux, but none provide 
>>what I'm looking for. Check out the information and screenshots of 
>>Spectrogram and Cspect here:
>>    
>>
>
>HASAS already has these kinds of output:
>
>http://www.sonarnerd.net/projects/hasas/HASAS-Spectrogram.png
>http://www.sonarnerd.net/projects/hasas/websgram.jpg
>
>So basically it could be OK with 3D display?
>
>
>  
>