[LAU] Ardour3: monitoring

Hello, With Fedora 15/CCRMA and Ardour 2.x shipped with it, I used to monitor a track (including EQ and effects) by adding an external send to an unused playback(s) of the 1010LT. The 1010LT itself was set for digital mix. When I do this with Ardour3, there's a quite noticeable delay in the monitoring which prevents it from being useful at all. The 'send1 out' are associated with playbacks 7 and 8 in the main routing diagram. And so... 1) At Arodur3 install time there was some option about monitoring and I've chosen 'something' which could have been the default. I will install 3.1.10 soon, so I can redo this step if needed. 2) Is this now a direct consequence of not using any low-latency kernel ? Thanks for any comments/suggestions - much appreciated as always. Cheers.