Hi all,
 
Has anybody used multiple MOTU MIDI Timepiece AV USB interfaces with Sonar?  Any problems?
 
I have a growing stable of hardware controllers, etc., at my desk and was researching MIDI merge boxes, etc., to consolidate the highway of MIDI cables running to/from the equipment room (~15 feet) but am finding no solutions.  But then it occurred to me that I might throw a second MTP AV onto the computer and run the USB cable to my desk where it can serve as a local hub.  Problem solved!
 
Will it work?  Any caveats?
 
Thank you!

In years gone past I had both a MOTU 8x8 and a MidiMan 8x8 Midi I/F's running with out problem.
 
Page 17 of the handbook for your Midi I/F seems to indicate that you can run multiple MIDI I/F's

Thanks, Wookiee.
 
That's reassuring, though I'm still a bit worried about installing two identical interfaces, each using the same driver - it seems like an opportunity for conflict, whether inside Sonar or before things even get that far.
 
But now it occurs to me that this is a small net to cast.  These are so cheap on eBay, I think I'll just snag one and give 'er a go....
 
Wish me luck.  :-)
 
And if it doesn't work, it's nice to know I can throw something else on there.  Thanks again.

Windows picks up MIDI interfaces like any other USB device then loads the relevant driver to the USB socket it's connected to if that makes sense. So Windows should handle two identical MIDI interfaces without problems.

Where Windows can be a bit dim is that if you connect a USB device to one socket then later connect it to another Windows can sometimes fail to realise it's the same one so loads the driver afresh for it but also keeps the previous socket hanging around. This is particularly relevant to MIDI interfaces as there's a limit on how many Windows can cope with and for some unknown reason Windows seems especially fond of keeping these ghost devices hanging around if they're MIDI interfaces. Or at least it does for me.

You can spot them if you go into Windows control panel/device manager and on the view menu pick 'show hidden devices'. They'll show up as ghosted out versions of whatever the device is and can be safely deleted.

I've found it's a particularly good idea to use Sonar's "friendly names" feature for MIDI interfaces/ports if you've a lot of them, things can get confusing otherwise. Or they do for me at any rate.

I just thought I'd follow up with a status report:  I'm up to three MOTU MTP AV MIDI interfaces now and they're all working fine with Sonar.  Yeah, it gets frustrating if you change USB ports after you've renamed and arranged 'em all.  TTSSEQ.INI is a help, but the key, I've found, is to attach and configure them one by one (in the order you want them to appear in), and to assign specific USB ports to each I/F and never move them.
 
Thanks, TLW, for the tip re deleting "ghost" devices in Windows Control Panel.