[Qt-interest] Frequency of Audio Tracks

[Gabriel M. Beddingfield]

Hi Vijay,

On Sat, 24 Jul 2010, Vijay Kansal wrote:

> I want to develop an audio editor using Qt.
> For this, I need to plot a waveform of the music track which I think should
> be a plot of frequency of sound versus time(please correct me if I am
> wrong).
>
> Currently, I have been using Phonon::AudioOutput class object as an audio
> sink and connected it with my Phonon::MediaObject class object to play the
> audio file.

IIRC, Phonon does not give the developer access to the raw 
audio data... and is therefore not appropriate for this sort 
of application.

You will need to use another audio API (or two) such as 
gstreamer, portaudio, libsndfile, etc.

-gabriel