sound library for php developement [closed]

Answer 1

You won't be able to do audio processing correctly with PHP alone, you should take a look at the following:

http://sox.sourceforge.net/

http://ffmpeg.org/

http://lame.sourceforge.net/

You can execute the above apps through PHP using something like shell_exec();

A better bet is to have a cron job running that does batch processing.

Answer 2

You can use this library to fetch idv3 information from music files getID3()

Something like this:

<?
require_once('../getid3/getid3.php');

// Initialize getID3 engine
$getID3 = new getID3;

// Analyze file and store returned data in $ThisFileInfo
$ThisFileInfo = $getID3->analyze($filename);

/*
 Optional: copies data from all subarrays of [tags] into [comments] so
 metadata is all available in one location for all tag formats
 metainformation is always available under [tags] even if this is not called
*/
getid3_lib::CopyTagsToComments($ThisFileInfo);

echo $ThisFileInfo['comments_html']['artist'][0]; // artist from any/all available tag formats
echo $ThisFileInfo['tags']['id3v2']['title'][0];  // title from ID3v2
echo $ThisFileInfo['audio']['bitrate'];           // audio bitrate
echo $ThisFileInfo['playtime_string'];            // playtime in minutes:seconds, formatted string

/*
 if you want to see ALL the output, uncomment this line:
*/
echo '<pre>'.htmlentities(print_r($ThisFileInfo, true)).'</pre>';
?>

If you want to resample/recode your music files, you can do that with LAME.

Fixed bit rate 128kbps encoding:
lame sample.wav sample.mp3

Fixed bit rate jstereo 128kbps encoding, high quality (recommended):
lame -h sample.wav sample.mp3

Average bit rate 112kbps encoding:
lame --abr 112 sample.wav sample.mp3

Fast encode, low quality (no psycho-acoustics):
lame -f sample.wav sample.mp3

Variable bitrate (use -V n to adjust quality/filesize):
lame -h -V 6 sample.wav sample.mp3