combining and synthesise samples

[avigail1]

Hi
Does anyone know if I can synthesise two audio samples in ableton live so that one sample contour controls the others? I hope this is clear, maybe I'll ask it this way: Is it possible to merge two sound files so that they become one and not two played back together?
Another question: Is it possible in the midi section to play a file and when a key is touched that the sample won't begin from the beginning of the file but will continue where I began?
Also when I transpose an audio file the speed of the file also changes. How can I transpose without losing the speed of the file? For example when I transpose a file up it starts sounding in fast forward.

[chapelier fou]

-Try the vocoder.
-Try warping clips.

[avigail1]

vocoder if I understand correctly and I might not be:) is an effect on one sample. I am trying to combine betwen two samples so that one influences the other, like say the frequencies of one sound the other, if you understand what I mean...
thanks for trying to help me:)

[triss]

creative use of a gate could help?