To remove vocal echoes will be very difficult with any tool. Each echo is slightly lower amplitude and time delayed from the prior one. In actuality, the effect that has been applied is called "Reverb" for reverberation. The vocals - which are recorded "dry" in a recording studio - are almost always processed with reverb to make it sound like it was recorded at a large music hall. Reverb makes the vocals sound wonderful by adding many echoes bouncing back from all 6 walls of the room. Thus, it is probably not possible to isolate a single echo and remove it, much less the whole group of echoes that constitute reverb.
Vogone 2.0 will allow multiple passes to try to remove one echo per pass. However, I don't know how much damage might be done to the music with multiple passes. We are still working on Vogone 2.0, but so far the basic vocal eliminator is far superior to Vogone 1.0. We have a number of "tools" yet to add in, designed to give you more ability to get the sound as good as possible. We are pulling out all the stops to deliver
THE Rolls Royce.
Please note, we don't expect all songs to be able to vocal eliminate, but far more should work very well than can be done with Vogone 1.0 and similar type tools.