Controlling OSC 1 & 2 pitch, manually

[durrdurrdurr]

hi again.. tried with automating the semitone on the oscillator, but it didnt work.. The transitions between the tones is not smooth, but step based.

This is what im trying to do: I have a pad sound playing the same chord for a long time. On that synth sound i have assigned LFO1 to control OSC1 and 2, with a pitch variation of 40 %. The LFO is set to saw, so the pitch smoothly goes from up to down. However, this method does not give me any control of when the pitch shift should start, pitch shift speed, and etc... So i would like to do this manually.

Here is an example: http://www.youtube.com/watch?v=N_CCyyvwffY go to 01.06 for the same type of effect.

So the problem here is basically: 1 - what function (like semitone) can do this, and 2 - how can it be done smoothly, preferably on OSC 1&2 together