[mad-dev] Re: How to know the frequency of a frame
Fri, 1 Aug 2003 14:16:26 -0700 (PDT)
But I found the samplerate for all the frames are the
same. And I think for each frame the frequency, which
is the X-axis value of visualized mp3 player for each
tone will be different. (When you use mp3 player to
play a CD, the X-axis displays the frequency and the
Y-axis is the volume I think. I want to know the
X-axis value for each frame. )How do I get this
--- firstname.lastname@example.org wrote:
> email@example.com wrote:
> > Message: 1
> > Date: Wed, 30 Jul 2003 16:56:15 -0700 (PDT)
> > From: Shiming Dong <firstname.lastname@example.org>
> > To: email@example.com
> > Subject: [mad-dev] How to know the frequency of a
> > --0-1603577723-1059609375=:7610
> > Content-Type: text/plain; charset=us-ascii
> > Hi there:
> > I have one question: I was supposed to implement a
> program to detect
> > a specific marker tone. But my problem is how to
> know the frequency
> > of each frame?
> > Thank you!
> > shiming
> I guess you mean the samplerate?
> For instance 44,1kHz.
> In that case it is easy. Once you have decoded a
> frame, at some point you
> will synthesise it to PCM samples.
> struct mad_frame myFrame ;
> struct mad_synth mySynth ;
> [...lots of code...]
> mad_synth_frame( &mySynth, &myFrame ) ;
> After that mySynth.pcm.samplerate will contain the
> For instance 44100 for 44,1kHz.
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