@svanya with [float $] you get the number if the [clone] instance. You can pass this as a variable into [expr].
Not sure about the second one, but I was thinking of this thread: https://forum.pdpatchrepo.info/topic/10798/setting-expr-formula-dynamically/20

I just applied recently with my midifilemarkovgenerator which is based on this abstraction for the MIDI innovation awards:
https://www.midi.org/component/zoo/item/midifilemarkovgenerator
Not sure, if it makes sense. But you can vote for it or something else until the 14th of may, if you like it...

@Orm that sounds great. Would be nice to try your external.

I solved it with sending raw midi data.

@ddw_music said:

The issue isn't about the operator to use. It's that the size argument to delwrite~ never gets sent out or in as a message (it's strictly a creation time argument).

Thats a good point.

Here is an updated Windows version (with a small change it works with Linux too): midifileMarkovWindows20220220.zip

I found out that it is an Emscripten / webMidi specific issue, on desktop it works fine. I guess I made some mistake in my webMidi implementation or it behaves differently...

@whale-av thank you. I will check that out.

@ddw_music I dont think so. Just limit it before with [min] [max], [moses] or something else (but you will still see the argument that is higher than the accepted value)...