Code 127 - Coded Data Field:
Duration of sound recordings
and printed music (NR)
Indicators: blank
Subfield codes
$a Duration (Repeatable.)
This subfield contains a six-character numeric string representing the
duration of a sound recording, or of a section of a sound recording, or of
the estimated duration of a performance of printed music. The time is
divided into three sub-elements, each two characters long, representing
the number of hours, minutes, and seconds. Each sub-element is right
justified; unused positions contain blanks or zeros.