Asher Bay

I'm trying to send notes to a vst instrument in Live via midiout. When I click to bang the kslider, the note triggers properly. However when I send bangs to the kslider via metro, no notes are played in Live. 

It works fine when I send notes via noteout, but noteout only works for the same track that the device is on. I want to be able to send notes to any instrument track. 

I'm trying to send notes to a vst instrument in Live via midiout. When I click to bang the kslider, the note triggers properly. However...

sending-notes-via-midiout-only-works-when-i-manually-click-not-when-i-send-bangs-via-metro

Sending notes via midiout only works when I manually click, not when I send bangs via metro

11OLSEN

Please someone take a look. I never noticed this before. A very simple js to observe the "mute" button state of a track. Add device to multiple tracks, everything works as expected, mute state is printed to Max window. Now as soon as one of the devices is deleted, all other js observers stop working. I even tested it with 2 different devices observing different path and property, they break each other when one is deleted.

mute_js_fr.amxd

JS is frozen into it and looks like this:

    var obj = new LiveAPI(callback,"live_set this_device canonical_parent");

        post(obj.path, args, "\n")

The same thing with Max object works as expected. Is there something wrong with the JS? How can removing one break another one in a completely different device and js? 

Please someone take a look. I never noticed this before. A very simple js to observe the "mute" button state of a track. Add device to multiple tracks, everything works as expected, mute state is printed to Max window. Now as soon as one of the devices is deleted, all other js observers stop working. I even tested it with 2 different devices observing different path and property, they break each other when one is deleted.
Here is a device:

JS is frozen into it and looks like this:

function bang ()
{
	var obj = new LiveAPI(callback,"live_set this_device canonical_parent");
	obj.property = "mute"

	function callback(args) 
	{
  		post(obj.path, args, "\n")
	}
} 

The same thing with Max object works as expected.  Is there something wrong with the JS? How can removing one break another one in a completely different device and js? 


Please someone take a look. I never noticed this before. A very simple js to observe the "mute" button state of a track. Add device to multi

js-observers-stop-working-if-another-devicejs-with-observer-is-removed-from-the-set

I can reproduce in both Live 11 and Live 10 (using 10.1.41, with whatever Max is bundled).   I thought there might be something funny with the scoping in the callback, but then I wrote the code like this and get the same result:

function bang ()
{
	var obj = new LiveAPI(function(args) {
		post("mute2", this.path, args, "\n") 
	} ,"live_set this_device canonical_parent");
	obj.property = "mute"
}

The below works fine -- the observers are appropriately isolated in their scope.  But it does nothing to explain how the function-scoped variable initialization you use gets graduated into a global scope...

var obj = null
function bang ()
{
	obj = new LiveAPI(function(args) {
		post("mute2", this.path, args, "\n") 
	} ,"live_set this_device canonical_parent");
	obj.property = "mute"
}
This is closer to how I do my observers (though often its in an array of observers or encapsulated in some other object.)  

I guess really my intuition is that the observer initialized in your original bang() ought to cease to exist after it's function scope since it's not explicitly retained elsewhere.  Then the fact that your code worked in the first place would've been a memory bug in Live.


Interessting, I have not seen it written like that. So instead of a function name I can write the callback directly into the LiveAPI( parameters)? I followed this doc . And 

Technical note: you cannot use the LiveAPI object in JavaScript global code.

doesn't sound like I have to retain the obj in global scope. Further when you look at the example at the bottom of this page it looks like it's the recommended way to put the callback into the function scope.
btw: support just confirmed it as a bug

I really lost some hair today trying to find the mistake.
 🦲 

I always took "you cannot use the LiveAPI object in JavaScript global code" to be about the initialization and function calls where writing them directly into the global code would imply you're trying to do things before [live.thisdevice] has notified that the Live API is ready.  For instance in the example code at the end of the page I would expect that code could only be happy living inside another function call (as in your bang() ), and that's sort of backed up by them having a 'return' statement in there.

As for the inline syntax format: I don't normally do that, either, as it's hard to read.  (It also comes with an  issue where it triggers with "id nn" before you've assigned the property name you want to observe).  It was just for me to test because I thought having a functional reference to 'obj' inside the callback was maybe a little questionable as I assumed the callback() would go away outside of your bang() scope. **

And now if it's confirmed as a bug -- and I assume you mean that your initial code should work and persist observers as written -- I guess I'm also surprised the implied behavior is that once you instantiate an observer it stays alive indefinitely.  Seems like that would be bad for memory/performance.  I normally track observer lifespan and aggressively try to unassign their observed property and null them out when they are no longer needed.

** I didn't intend to confound the two differences (inline callback AND variable outside of function) in the second example.  Sorry!

Yes it makes sense to track the lifespan. I had a few situations today where it seems like callbacks were called from memory so that I had 3 messages from one api object. But that may also be caused by opening and closing the editor. Anyways I'm waiting for the fix. Thanks for looking at it Tyler!

Is there something like free(obj) in js? Setting obj.property ="" doesn't feel like obj will be garbage collected. But the global scope will help to reuse it without creating new LiveApis all the time. I can see that!

there is for... only jitter objects:
myJitterObject.freepeer();

I think I just borrowed that obj.property = "" practice from elsewhere in this forum.  For some reason in my Favorites list is now marked as spam!:


In effect what I've been doing (maybe without satisfactorily answering your question for all JS) has been:

obj.property = ""
obj = null

And it seems to work... certainly no more redundant callbacks getting fired for me?

I would love to see an official JS LiveAPI best practices guide.  There is a decent amount of not-very-intuitive stuff that goes on, IMHO.

To conclude here and for future reference: Putting the obj variable in global scope seems logical and fixes the problem of my first post. I'm no longer convinced it's a real bug, maybe just some confusing example code in the live js documentation.

var obj;
function bang ()
{
	obj = new LiveAPI(callback,"live_set this_device canonical_parent");
        obj.property = "mute";
        
 	function callback(args) 
	{
  		post(this.path, args, "\n");
	}
}

JS observers stop working if another device/js with observer is removed from the Set

argosound

the attached patch shows stange behaviour:

The aim is to be able to drag in a folder with movie files and let the patch create clips with the names of the files and attach their Id to a coll, to be able to play the movies from the clip view in Live, and with this with a controller (eg. APC40).

This does work as long as the patch is open in Max: the clips are created and named. and it is possible to play the movies by playing the named clips.

When the device is just in ableton, this does not work. the clips are created, but not named, that I don't get at all.

also they are not connected to the movies, because the coll is not filled. I have read about  coll not properly working within m4l. is there a way around this? should i get into dict? i never uses it before. 

The "bug" shows up if i use the Ableton internal or the external Max app.

If you want to look at the patch, all the stuff i mentioned happens within the "cliploader" subpatch.

any help or hint is highly appreciated. Thank you very much

P.S.: OSx10.15.7, ableton 11.3.21, max 8.5.6(internal), 8.6.2 Full App

Helllo dear all,

the attached patch shows stange behaviour:

The aim is to be able to drag in a folder with movie files and let the patch...

different-behaviour-with-coll-an-umenu-in-open-patch-and-within-live

Different behaviour with Coll and Umenu in open Patch and within Live

spin lud

Hi guys, I am trying to configure a basic patch that loads some video clips from a folder and play a random video at random position when triggered by audio signal. The problem is that when I try to open the device Max panel inside Ableton, this causes a crash. I tried both with the Max bundled version and Max standalone version (8.6.2) linked to Ableton (12.0.1).

Does anyone know why is this happening and how I can fix?

Hi guys, I am trying to configure a basic patch that loads some video clips from a folder and play a random video at random position when...

basic-patch-to-play-random-video-at-random-position-causes-max-to-crash-when-opening-device-panel-in-live

Basic patch to play random video at random position causes Max to crash when opening device panel in Live

Florent Ghys

Hello, I'm trying to understand why Max For Live is having issues with the folder object. 

I have a simple "folder" object inside a M4L instrument. 

When opened in Max, it works fine. When opened in Ableton, "folder: no such object". 

Screenshot 2022-12-26 at 1.29.12 PM.png

Is this a limitation of Max For Live or a bug? 

Hello, I'm trying to understand why Max For Live is having issues with the folder object. 
I have a simple "folder" object inside a M4L instrument. 
When opened in Max, it works fine. When opened in Ableton, "folder: no such object". 
I'm using Max 8.3.1 and Ableton 11.2.7

Is this a limitation of Max For Live or a bug? 
thanks!
Florent


m4l-folder-no-such-object

the strange thing is that is I create a new M4L device with a folder object in it, everything works fine. 

even creating a new M4L device with a folder object doesn't work

but when I put the exact same device on my desktop, it works fine.

I'm getting really confused here, any help appreciated!! 


M4L - folder: no such object

Pier Mckenzie

Since ableton 11 there has been an known issue with Nico Starke's ML-185 Stage Controlled Sequencer 0.9 , namely the fact that when a project is opened or even during a project it will only play one note and not the sequence that it has programmed in the sequencer.

As I and thousands of others use this sequencer a lot, and that it doesn't seem to have a patch incoming at all as its last one was in 2009, would anyone here have the capabilities to fix this and upload a working version? 

I know it would be very popular even if someone could make the exact same sequencer with the same UX but maybe in black to distinguish them.

If anyone could help you'd be saving mine and so many other peoples projects as many of the replicas out there are far too different and many have major bugs at the moment

Hi everyone,

Since ableton 11 there has been an known issue with Nico Starke's ML-185 Stage Controlled Sequencer 0.9 , namely the fact...

anyone-able-to-fix-the-ml-185-stage-controlled-sequencer-09

Anyone able to fix the ML-185 Stage Controlled Sequencer 0.9 ???

Dante

The is_recording and playing_status of the Clip Slots department seem to not be working.

I tried observing both audio and midi tracks, both of which have clips that are playing: has_clip always correctly reports 1, is_recording 0, playing_status 0.

For the audio track I am recording a clip by firing an empty clipslot, so looking for is_recording to observe a 1 when that happens. 

I was looking for a work around and saw that playing_status also does not observe any changes. Looking for playing_status to report a 1 upon playing, and 2 when recording. I checked on a Midi clip as well, and same problem. 

Using the latest Max8, Live12, Windows 11. 

The is_recording and playing_status of the Clip Slots department seem to not be working.

I tried observing both audio and midi tracks,...

maybe-isrecording-and-playingstatus-arent-working-in-max-for-live

Maybe is_recording and playing_status aren't working in max for live?

Hello, since I've updated Max to 8.6.x and Ableton Live 12.x, the object curve~ doesn't seem to behave appropriately when inside a poly~, and inside a Max For Live device.

The following patch works fine with Max 8.3.x and Ableton Live 11, but it not with the updates:

It seems like triggering [mute 1, 0] to thispoly~ followed immediately (t b b) by an envelope message to curve~ causes the latter to bang to its right outlet immediately, thus turning off the instance too soon. 

Any help/suggestions would be immensely appreciated! 

Hello, since I've updated Max to 8.6.x and Ableton Live 12.x, the object curve~ doesn't seem to behave appropriately when inside a poly~,...

curve-doesnt-work-inside-poly-anymore-m4l

curve~ doesn't work inside poly~ anymore? (M4L)

Just Evan

Hi, I'm trying to make a expandable window that hides part of a [bpatcher] object, but when I send setwidth 80 (half of the bpatcher) to [live.thisdevice], I get a small space instead of being cut off at the given coordinates. What could be the problem?

Hi, I'm trying to make a expandable window that hides part of a [bpatcher] object, but when I send setwidth 80 (half of the bpatcher) to...

expandable-window-problem

 Expandable window problem

Messinki

I'm making a MIDI transformer in Live 12 that works as a quantizer, and have found a really weird issue, it seems like there can be rounding errors or jitter when live.miditools transforms notes.

https://media.giphy.com/media/v1.Y2lkPTc5MGI3NjExNGExejM3MnE5dHoydmZxOHFiZ3R3ZWg2ZWFueXRyZGI0eHRrN2pociZlcD12MV9pbnRlcm5hbF9naWZfYnlfaWQmY3Q9Zw/xbavKlSwSez1bK1hmJ/giphy.gif

I've created a stripped down Max patch to illustrate whats going on. The device moves the start of any selected MIDI notes without moving the end by doing:

The end of the note being transformed should always be the same, but if you have two notes that are right next to eachother, and select the first one and then start shifting the dial, the end of the selected note occasionally moves enough to make the unselected note disappear.

Does anyone know what might be going on, and how to fix it, without doing something like duration - 0.0000001. (Which does work, but causes other problems)

Helloo,

I'm making a MIDI transformer in Live 12 that works as a quantizer, and have found a really weird issue, it seems like there can...

Cycling '74 Forums

try to send proper note on and off, not only note on.

They don't even consider it necessary to update the code example. So there will always be people who fall into this trap.

you querry highlited_ clip slot which can be highlited in any track. then

max panel - you mean video screen ? I guess live and max open the video twice when you edit your device and can't agree about it. I...

Hello, I am still getting the error message "folder: no such object" in all my M4L devices even after updating to Max 8.6.2 and Ableton...

Absolutely, will do! Thanks again!!!

Thanks so much for the reply PRIMROSE OHLING. Yes, it is a bit tricky to wrap my head around asking info from a clip that doesn't exist...

OK I think I got it: sending a message to curve~ while an instance is off causes curve~ to bang its right outlet next time the instance is...

This worked great when I slightly increased the minimum window width from 80 to 90. Apparently the minimum size that can be set is 90.

Helloo, I'm making a MIDI transformer in Live 12 that works as a quantizer, and have found a really weird issue, it seems like there can...