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Please explain LED feedback messages sent from Ableton Live

edited November -1 in Hardware
Can anyone explain the messages that are sent by Live when a clip is launched. Generally, whatever controller message is used to launch a clip seems to be sent back to the controller by Live.
It's a little more complex than that, though.
I use Continuous Controller messages to launch clips, so, I do this:
CC numbers are mapped to launch clips as follows
Track1 Track2
Row 1 CC1 CC2
Row 2 CC3 CC4
I also map a Continuous Controller to each Track Launch
Track Launch CC5 CC6

When I launch a clip, Live sends feedback, but it's more complex than I would have thought.
Say I launch the clip in Row1/Track1 with a CC1 (any value, 64 or greater, launches the clip).
The midi feedback is:
CC1 126 (clip launch Row1/Track1)
CC5 126 (Track 1 launch)
then the same two messages, with a value of 127
CC1 127 (clip launch Row1/Track1)
CC5 127 (Track 1 launch)
If other clips have been launched previously, Live sends value 0 for other track launches which have been active, and 0 value for any clip that is in the same row as the newly launched clip, but isn't playing its clip.
It's almost understandable. Can anyone fully explain this, please.
Thanks,
Gabriel
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