Trip Synth Question

[Dmitry Steinhart]

Hey people! I'm currently trying to learn Halion Sonic 3 SE and I'm stuck with Trip. In the MOD tab you can see a parameter which is called Sync Mode. I know what It does. It's pretty self-explanatory. The problem is that when I set it to BEAT the synth seems to start playing my sound at a random wave point, which sound inconsistent. Than I tried FIRT and EACH note. It seem t have solved my problem but what is the difference between these two modes? I have read the user manual but Steinberg seem to have ignored this part. Now I'm stuck. Any help would be appreciated!