Adding brackets to Audio Duration in Title

[HardBop]

I have added track length to track title using the format title.displayFormat={$title$#AudioDuration}, and it picks it up with no problems on my control point. I wanted, in addition, to simply add brackets around the track time, but struggling to format it correctly.
Also, although I image this isn't possible, can the track length be just added to the "queued playlist" showing each track length on that album, rather than on the actual track being played as well, as the length of the playing track is already indicated on the time elapsed bar on the control point?
Many thanks.