Hello, all. I'm very new to processing but recently got into it and it's been amazing so far. I also find it amazing how many replies there are on here. You're all awesome. I made a patch using the abl_link~ library to sync the tempo with Ableton. It's awesome to be able to send midi signals but I'm hoping I can go a little further with Pd. Now I'm wondering how I can send midi signals in the form of effect automation. I figured this must be possible since effects can be mapped to midi controllers.
Btw here's a song I made with my first patch (mix of my patch and Ableton):
peace and love

The most powerful way to control ableton live devices is using Max for Live API, Using it you can comunicate from Pd with Max for Live via OSC messages. It can be ok if you have good patches in Pd and don't want to rewrite all in Max.

The other way is sending MIDI messages to Ableton and manually map each message you are sending from Pd.

If you are in mac, you can use IAC driver.

In Windows, some software to do the same... I don't use Windows so I only remeber one option, which is loopmidi.

Once you solved the comunication bridge of MIDI data with Ableton and Pd I recommend you to use ELSE library, which is at disposal in deken. It comes with some facilities to compose and send midi messages from Pd, and comes with a Live Electronics Tutorial which have a session dedicated to MIDI messages.

@emviveros amazing. Thank you so much for the info