I've uploaded menu.mo3 (just in case, the _original_ menu.it is also there). Starting at position 5 (pattern 4), A melody pops in (channel 6 to 11), the instrument is going through a hi-pass filter which has been activated in the first pattern (and in the very same pattern as well). If I play the mo3 in XMPlay or any other BASS-driven application, it sounds like it's supposed to sound. The unmo3'ed version uses a low-pass filter instead, as it does not seem to understand the Z92 command anymore.