AudioClip loop issue

[OlivierJean]

The following code doesn't work.
The audio clip "sound.mid" is played only one time, but is not played in loop.

#VRML V2.0 utf8

DEF TS TimeSensor { startTime 0 loop TRUE cycleInterval 1 }

Sound2D {
  source DEF AC AudioClip {
    url "sound.mid"
  }
}

ROUTE TS.cycleTime TO AC.startTime