For my JazzMutant Lemur M4L Cliplauncher, I need to change the status of one of the clips when it's triggered from Live. I don't want to update the whole aray (imagine you have a 16x16 grid updates every time) and make things efficient as it can get.
I was reading the JazzMutant Lemur's manual and found one:
replace(a,b,position)
takes an array, and replace the items starting at “position” with b ( b can be an array or a singleton )
Examples:
replace({0,0,0,0}, {12,2}, 0) = {12, 2, 0, 0}
replace({0,0,0,0}, 0.15, 3) = {0, 0, 0, 0.15}
If position is not an integer, the parser converts it using the floor function (next lower integer)
So this is great stuff!
Let's take a look how I can observe whether a pad is hit (I monitor the whole track, since only one clip can be active at the same time). I use this patch to observe track 0 (the 0 is the first track):
This patch shows how to observe the whole track. Once a clip is started, it should send some message.
This is the response from the "print observer_response":
Message -2 means a stop (or empty slot without ARM or OVR enabled) is triggered, so the playing clip is stopping;
Message -1 means that no clip is being activated, this message is always send after an action (or at loadbang);
Message 0 means the top clip is fired;
Message 1 means the next (so the second clip on that track) is fired, and so on...
So the above example is: I started clip 0, waited some time, fired 1, waited some time, clicked the track stop, and the first -1 is the loadbang - an actual status telling you that no clip is being fired.
What can we do with this information? We need a patch that remembers what clip was last started, at the moment it gets a positive number, the lights should blink and go on at -1 message. When a next one is fired, 1 is received, remember the old clip (since that one should go out), blink the new one, remember this one too. At -1, enable the light, and switch the old on off. And forget the old one, keep the new one.
I'll try to create this patch tonight.
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