Visualizing a wav file?

[Diez B. Roggisch]

kaens wrote:

> On 7/11/07, Wim Vogelaar <wim.vogelaaratmc2worlddotorg at bag.python.org>
> wrote:
>> Perhaps you can use parts/routines of Audacity.
>> See: http://en.wikipedia.org/wiki/Audacity
>>
>> Wim Vogelaar, http://home.wanadoo.nl/w.h.vogelaar/
>>
>>
>> --
>> http://mail.python.org/mailman/listinfo/python-list
>>
> 
> I'm aware of audacity.
> 
> Correct me if I'm wrong, but I don't think Audacity is written in
> Python, although I think someone wrote a way to script it a bit using
> python.
> 
> While looking at their code might prove useful to me, I'm looking for
> a way to implement this in python.
> 
> To provide a clearer (and audacity related) example, I'd like to be
> able to show the waveform as it's playing - like if you zoomed in
> decently far on a sample in audacity while playing it back. If I can
> accomplish that, I think I can figure out most of the other stuff I'd
> like to do on my own.
> 
> Just looking for some points in the right direction.

For the visualization, you'll need a GUI-toolkit. Google this group for a
plethora of discussions which are available and the respective
advantages/disadvantages.

The main problem will be the synchronization between the playing-process and
your display. I have no idea if there is any feedback from the sound system
that you can faciliate to compute the actual playing position.

diez