I have a short question: why and how?
[...] i can, nevertheless, for the love of god, NOT deactivate this d****ed tap function. So, could someone please tell me how to de-activate it and why i have to do it?
How:
yeah, press rig (tap, don't hold, or it'll just make the rig a favorite) to get to the rig options menu and look for "tempo enable" and uncheck it.
Why:
Since the reverb is 100% wet and only applied to the delay effect's output, not the direct guitar signal, you need a low delay time for the reverb to kick in faster. Your delay time is essentially your pre-delay for the reverb. Some of the presets you can hear a clear lag between your playing and any kind of ambient effect - these will only be useful for ambient style playing where you are sustaining notes. For something more like funk or shred, the verb needs to kick in very quick, which requires very low delay times. I have some of the delay times set very low, which are outright impossible to do via tap tempo. I am not sure about manually editing the tempo though - I don't know what the max bpm is.
But in any case tempo sync does not model a real environment as one would capture reverb - the independent reverberations are coming from a multitude of distances, which gives them their different delays. That's the effect I'm going for - I don't want to hear clear delays - I want very quick pulsing delays, which are going to smeared heavily by the 100% wet reverb. This gives the effect of a cave-like environment - lots of little reverberations with a little distance between them. By varying the delay times vs reverb time, you get the sound of different environments. This also applies to tone and dampening.
If you're using tempo enabled, you are not going to get the effect desired, because you are likely getting a far longer delay time, which not only makes the delays more noticeable but adds a long pre-delay to the preset.