Problems syncing external midi device with Logic.

Hello,

pv_joker has just posted in the Logic 8 forum of Logic Users Group under the title of Problems syncing external midi device with Logic.

This thread is located at http://www.logic-users-group.com/forums/showthread.php?t=4845

Here is the message that has just been posted:
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I'm trying to sync my Electro Harmonix 2880 Super Looper with Logic Pro 8 using Logic as the master and the 2880 as the slave.  I have synced external devices with Logic before and never experienced any problems.

I’m getting towards the end of my tether with this and I’m really hoping someone can help.  I have the latest 1.5 software upgrade for the 2880 and, as far as I can tell, it is technically in perfect sync with Logic.  The 2880 (in ext. clock and quantize mode) is definitely receiving midi clock from Logic via my Motu Ultralite mk3, the looper reacts appropriately to play and stop messages from Logic and does not give any error messages to infer that it is not syncing properly.  I have set Logic up to transmit midi clock to my soundcard's midi out and, as far as I can tell, the 2880 is definitely receiving it.

The problem I have is that when I’m playing back a recorded loop, the tempo seems to waver and create changes in pitch.  It seems as though the 2880 is being clever and following an uneven midi clock input.  I have read around on the net and have come across a couple of workarounds that suggested to record a blank loop first, re-record over this loop and then let it play back with the volume down for one revolution of the loop (to let the looper ‘settle in’ to the midi clock tempo).  Unfortunately I’ve been unable to make this work. Is it possible that the clock coming from Logic is not steady?  Or could it possibly be a problem with my soundcard not transmitting midi clock correctly?

I’m certain that I can’t be the only person who has ever experienced this problem but have been unable to find much info regarding it.  Any help on this would be much appreciated.  I have a gig coming up very soon and I’m starting to freak a little bit.

Thanks.
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