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Dan Nigrin

I'm trying to get around some of the clunkiness in using Max's built in objects to read in MIDI files (detonate, filein, seq, etc...).  Specifically, I'd like an easier way to read the actual tick counts for the delta time and duration times for each note (rather than msec which detonate outputs), as well as the tempo.  

I started to explore using some existing Javascript libraries to do this, but sadly, my Javascript skills are not great, especially in Max.  V8, Node.js, etc... are all pretty new for me.  I came across this, 

https://cycling74.com/projects/midi-parsing-using-javascript-in-max

 , which looked promising, but no accompanying help file to walk through its usage.

I also see midi-parser-js as a Node NPM project which looks even better, and I can load it into a node.script object in Max, but then don't know how to use it from there:  

https://www.npmjs.com/package/midi-parser-js

There's also midi-file, another NPM project, but again, just don't know what to do once loaded 

I'm trying to get around some of the clunkiness in using Max's built in objects to read in MIDI files (detonate, filein, seq, etc...). ...

midi-file-parsing-javascript-help

MIDI file parsing - Javascript help

Philippe Roger

I'm facing a problem that I've never managed to solve, so I hope someone can guide me into the right direction: 

I need to code a matrix~ that applies gains & delays at the same time

I'm doing some spatialization work with some quite heavy constraints : 

 for the muscles. Everything's working great, that's cool.

Now, I would like to add delays to every single [object - speaker] pairs and that's where I'm stuck! I  simply can't figure out a way to create de delay matrix in max, nest it with the classic mcs.matrix~ object and keep the cpu usage arount 40% (on a M1). I've tried the "mcs.poly~ + tapin~ / tapout~ approach but my CPU told me that wasn't the right idea ^^'

Hello,

I'm facing a problem that I've never managed to solve, so I hope someone can guide me into the right direction: I need to code a...

how-to-code-a-matrix-that-applies-gains-and-delays-at-the-same-time

How to code a matrix~ that applies gains & delays at the same time

Leo Monti

So basically this patch should receive the parent track's name and remove it's first letter. As the title says, this event should happen right between someone pressing "del" on live (or any form of deletion command) and the device actually being deleted. 

I can't for the life of my wrap my head around editing or changing the priority queue.

So basically this patch should receive the parent track's name and remove it's first letter. As the title says, this event should happen...

track-name-change-happening-on-device-deletion-from-same-live-track

Track name change happening on device deletion from same live track

Mathieu LENGAGNE

I'm trying to receive some NASA data via their API using maxurl. So far so good, I can get the data I want. But I'm struggling to get some of the dict content. I get all keys of my subDict with a getkeys message but when I send the message "get close_approach_data::close_approach_date_full" I have the error "dict: no dictionary named close_approach_data, cannot get value" even if I got the key from a "getkeys" message. 

I think I'm getting confused on dict data format : some are arrays, some are dictionaries, other are just messages. 

So my basic question is : what am I doing wrong here ?

Hello everyone.

I'm trying to receive some NASA data via their API using maxurl. So far so good, I can get the data I want. But I'm...

help-needed-on-parsing-dict-data

Help needed on parsing dict. data

Ruz Kut

I've managed to translate the ascending insert-sort algorithm into GenExpr, but there are issues to be solved.

Mainly, it seems like it always miss some values, resulting in a semi-sorted buffer... ?

Do you think is a problem related to signed floating values ?

Is there a way to create an integer variable (not a constant) in GenExpr so the for-loops are more precise ?

I've also tried with [data] before with the same code, but It always gives me weird errors (gen~ kernel, unable to compile, etc...)

btw I'm doing this in order to modify the gen-chopper-repeat patch so that I can play grains by reading an index sorted by RMS values, so of course the more precise is the sorting the better. (the concept is that of grain-tagging, something like CataRT by IRCAM).

Hi all !
I'm no expert in code whatsoever
BUT
I've managed to translate the ascending insert-sort algorithm into GenExpr, but there are issues to be solved.
Mainly, it seems like it always miss some values, resulting in a semi-sorted buffer... ?

Do you think is a problem related to signed floating values ?
Is there a way to create an integer variable (not a constant) in GenExpr so the for-loops are more precise ?
I've also tried with [data] before with the same code, but It always gives me weird errors (gen~ kernel, unable to compile, etc...)

btw I'm doing this in order to modify the gen-chopper-repeat patch so that I can play grains by reading an index sorted by RMS values, so of course the more precise is the sorting the better. (the concept is that of grain-tagging, something like CataRT by IRCAM).


insert-sort-of-a-buffer-in-gen-codebox

Forgot to link my reference for insert-sorting
http://mathbits.com/MathBits/CompSci/Arrays/Insertion.htm

If only someone fluent with codebox could give my patch a look I'd appreciate it :)


I noticed one thing though, if you try and work with longer buffers the sorting contains less samples than the input. 

Yes -- the Max console hints at why: "gen~: audio processing exception: Too many iterations (runaway loop?)"

For safety, gen~ forces a limit on how many loop iterations can happen on each vector -- this limit is currently defined as 100000 * vector size. The reason for doing this is that too many iterations can cause an audio dropout, and infinite iterations will lock up the entire audio thread (possibly crashing it). Per Turing, there's no way to know in advance if a given piece of code will loop forever, so we work around this by having the loop iteration limit and bailing out of audio processing when this limit is reached -- and printing the warning to the Max console.

Although the buffer size in your patcher is 44100 samples long, and thus less than the loop limit, the insert-sort algorithm can cause millions of iterations due to the nested loop. This really is too many to process within one signal vector, and would cause audio dropouts. 

To process millions of samples in gen~, the solution is to distribute processing over time. Sadly there's not an easy way to convert the code to do this -- but after a bit of manual work, here it is working. What I found interesting in this is that the semantics of the code became a bit more obvious:

Note that if you want it to sort faster, you can wrap that final if() block in a for loop, but this will increase the CPU load:

Another option is to process the insertion sort via some non-gen~ solution. If you still want to use GenExpr, you could actually achieve it via jit.gen and jit.buffer~, but I don't think insertion sort is the best sorting algorithm to use, as it can't take advantage of the parallelism of cell-based processing. sample-sort, quick-sort, aa-sort etc. might work better.

Thanks for those examples - fascinating and illuminating! 

insert-sort of a buffer in gen codebox ?

Simon East

I have a really odd issue that I have been trying to debug for a week now and I am getting nowhere with it - so maybe someone here has some ideas that might help.

I have an existing M4L plugin that is released and working fine in Live 10, 11 and 12.

I've made some updates to it and Livee now it crashes when a project containing the plugin is loaded into Live 10.1.43 - it does not crash Live 11 or 12.

I've created two new Live 10 projects that only contain the original plugin. One I save with the default plugin settings. The other I save with a change to one live.numbox item.

If I then switch the plugin file to the new version, restart Live 10, and load the project with the default plugin settings it works fine. But if I try and load the project that has the one change saved it crashes every time.

I have now deleted everything else from inside the new version of the plugin apart from the single live.numbox item and the crash still happens - it seems to simply be the act of Live setting the value of the live.numbox that is crashing it. The only thing that might be slightly out of the ordinary is that the live.numbox is in a bpatcher maxpat which is itself contained in another maxpat because this code is reused in a number of other plugins - but these nexted bpatchers have been working fine in previous versions.

I've also found one other UI item, a live.menu, that has the same effect. But other live.menu items in the maxpat work fine and don't cause a crash. Same thing happens with this - if a test project is saved with the original default settings then it works fine, but if the selection of the menu is changed then it crashes when loaded.

I have tried this on Mac and Windows - same crash on both - so I don't think it can be some local config issue. Besides that this has all be working fine for previous releases.

Anyone got any ideas how I can work out what is going on here?

I have a really odd issue that I have been trying to debug for a week now and I am getting nowhere with it - so maybe someone here has some...

maxforlive-plugin-crashing-live-10143

MaxForLive plugin crashing Live 10.1.43 

Tim Horne

So, I am finding that when I had a certain amount of lights within a scene that when I add too many lights it switches all of them off until I switch the last one off. So it appears that jit.world has a limitation placed upon it for how many lights are allowed to be switched on at any one time.

Has anyone come across this problem when they have a wanted to use many lights and found a way to resolve this, please?

I want to have loads of lights flashing and making g cool patterns so it’s pretty important I find this solution to this one!

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