BPM

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2 total messages Started by Min Char Mon, 10 Feb 2003 16:58

#845

Author: Min Char
Date: Mon, 10 Feb 2003 16:58

4 lines
1035 bytes

Do anyone knows how to detect the bits per minutes of an audio file?
Any help?

Thanks

Re: BPM

#846

Author: Michel Leunen
Date: Tue, 11 Feb 2003 08:28

40 lines
1963 bytes

In article <3e47da06@newsgroups.borland.com>, min_char@yahoo.gr says...
> Do anyone knows how to detect the bits per minutes of an audio file?
> Any help?

Both .wav and .mp3 files have a header with the information you're 
looking for. For instance, wav file header begins with the following:


// This is the start ID of a Wave file
// must contains 'RIFF' and 'WAVE'
char startID[12];
//FormatChunk 
struct FormatChunk
{
  char            chunkID[4];		//contains 'fmt ' with no 
ending \0
  long            chunkSize;

  short           wFormatTag;
  unsigned short  wChannels;
  unsigned long   dwSamplesPerSec;
  unsigned long   dwAvgBytesPerSec;
  unsigned short  wBlockAlign;
  unsigned short  wBitsPerSample;

// Note: there may be additional fields here, depending upon 
wFormatTag.

};


Take a look at www.wotsit.org for informations about the format of each 
file type. 

Michel
-- 
-------------------------------
Michel Leunen
http://www.leunen.com/cbuilder/
-------------------------------

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