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msearancke · Posted: Thu Mar 04, 2010 11:19 pm Post subject: TSampleGrabber draw waveform

Can anyone point me in the right direction with drawing an audio waveform.
I want to load a music file and visualise it on screen.
I assume I would use the TSampleGrabber to get the data but I'm not sure how to process it for drawing.

Thanks in advance.
_________________
Martin Searancke
LightFactory
www.lifact.com

BlackTrip · Expert Member Joined: 19 Mar 2005 Posts: 191

Hi, you can use the DC-DSP Filter to visualize a wav form. It can export Visualazation and PCM Data to any Application (see Sample Apps in the Samples Directory). If you like to develop the wav form stuff by your own, then you can get a idea by digging inside the DC-DSP Filter code how to do it:
http://dsp-worx.de/?n=4

msearancke · Posted: Mon Mar 08, 2010 10:42 pm Post subject:

Thanks, I did start off looking at these components but gave up because of install issues.
Using Delphi 2009 version of these componets I just cant get past "File access denied" error when I try to install the DSPack Filter.
I will try and look at the source and see if I can extract what I want.
_________________
Martin Searancke
LightFactory
www.lifact.com