Angle seems to switch from + to - at an odd place

[pixelzoom]

In ArmPositionSoundGenerator, address this workaround:

      // determine if the new angle crossed over one or more 'sound points' since the last angle
      if ( this.fullyEnabledProperty.value && previousAngle !== null ) {
        numClickSoundsToPlay = Math.abs( Math.floor( previousAngle / binSize ) - Math.floor( angle / binSize ) );

        //TODO https://github.com/phetsims/balloons-and-static-electricity/issues/570 This is a temporary workaround for an issue where the angle seems to switch from + to - at an odd place
        if ( numClickSoundsToPlay > NUM_SOUND_POSITIONS / 2 ) {
          numClickSoundsToPlay = 0;
        }
      }