How to make sounds morph in Ableton

This is a pretty newbie question but I'm having trouble coming up with a straightforward answer. Basically I want to know how to make sounds morph throughout a track. For instance, making the hi hat subtly change sound so that it doesn't just sounds like a cop paste throughout the whole track. The only solution I've come up with is making a copy of the track and changing it a little bit over and over, but then I end up with like 10 different hi hat tracks for a simple hi hat. Is there any way to change the dry/wet of a reverb effect throughout the track in a mixdown? I would see how you could do it in a performance setting live, but I'm confused about how to do it for a mixed down track.

Sorry if this didn't make any sense :)

Automate the depth of the effect. Look at automation.

RTFM.

thanks, exactly what I was looking for. had a feeling the answer was right in front of my face.

Automation is the most natural answer but you could also change loop values such as pitch and volume setting per loop over time, even do gating if you want to (see manual.)

Look up clip specific automation. You can create a volume automation that spans for say 4 bars, even though the actual highhat is only a 16th note long, so that you can just launch the 16th note loop but have a modulation for a longer duration, looping independently of the clip. Look it up! It's the buttons where all warpoptions are. It says "volume" in the example I described above.

check out the ADSR effects inside the sampler/simpler/drum rack, you can automate those :D