I've been using K2 for a few weeks now and have run in to a couple issues. this is my first soft sampler so please bear with my ignorance. I'm using K2 with Nuendo 2.
I haven't been able to get any usefulness out of the expression controller. I'm using the included VSL strings and am trying to make more expressive legato lines but I can't hear any change in expression even when drawing erratic lines in the midi editor. Also, many of the legato instruments "chirp" on the first note. It sounds like a grace note but is intermittent. Has this bug been fixed?
Also, is there a way to use one convolution reverb as a send effect and then send multiple instruments to it? I can only seem to do one reverb for each instrument which sucks all the memory up.
There are more questions to follow but this is a good enought start.
For some reason the VSL patches don't have expression programmed by default, you have to add CC11 as a modulator if that's what you want to use. Open "Group Editor" and select the "Edit All Groups" button unless you want to do it one by one. Move down to the Amplifier module and click on "Modulation". Next you add modulator | External Sources | midi CC. It defaults to CC1. Change it to CC11. For expression I have the slider at -100%. I use a slightly non-linear curve. There is a little graphic of a curce to the right of the slider. If you click it expands the windows. You can click the "Active" button and draw your own curve or there are some presets. I copied one from another orchestral library and saved it as a preset. It works well with VSL.
It sounds like you play a legato sample without any previous note to attach it to. I imagine this is a situation, where you should start with a non-legato patch note and proceed with the legato patch using its Ghost note feature.