Last updated August 18, 2014. Created on September 3, 2013.
Edited by N30, GrahamO. Log in to edit this page.

To do this in Drupal 7 first install two modules : getID3() and Computed Field.

In the content type that holds the details for each audio track add a field of type 'Computed'
For this field, in the entry 'Computed Field (PHP)' insert the following code:

= menu_get_object();

//this is to be a new node so get audio file uri from
    //most recent entry in Drupal's file_managed table
$name2 = db_query_range('SELECT uri FROM {file_managed} ORDER BY fid DESC',0,1)->fetchField();
//this is an existing node being edited so get audio file uri
    //for this node from Drupal's node table
$thisname = field_get_items('node', $node, 'field_audiofile');
$name2 = $thisname[0]['uri'];

$fileinfo = getID3_analyze(drupal_realpath($name2));
$playtime_sec = round($fileinfo['playtime_seconds'] / 60);

//Generate playtime in minutes (for display only), @type String
$playtime_mins = $fileinfo['playtime_string'];

$entity_field[0]['value'] = $playtime_sec;

where 'field_audiofile' is the machine name of the field used for the file path of each track
In this case '$playtime' uses PHP code to give the duration of the track in minutes

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