> Are you using ASIO or MME drivers (audio settings window)?

ASIO

> When you play on the Thru track, are you sure that you are in fact hearing the Hi-Q sounds? i.e. the sounds played by the SampleTank DXi synth.

Yes, i'm sure of that.

> Thru playback can be routed differently depending on whether the song is playing/stopped, and whether using MME/ASIO drivers. There are also two settings that affect this: "ASIO always on" (audio drivers dialog) and 'Route MIDI Thru to MIDI driver" (MIDI Driver Setup dialog)

I've tried to check and uncheck both, without fortune.

So this is not a general issue? It happens on my system only? cry

Anyway thanks again for your support!