On Thu, Dec 31, 2020 at 6:42 PM Spencer Salazar wrote:

Correct, Std.system does block concurrency. Depending on what you're trying to do there are a few workarounds..

Hi Spencer, thanks for your response

- make any Std.system calls at the beginning of your ChucK script, before audio has started processing

Although it is a good solution, it is not usable in my case, In the actual reasoning I need to grab from R new notes each step of a 16 step sequencer.

- run the R scripts in the background using Std.system -- Std.system more or less directly calls system(3), and it seems as though '&' works, though I havent personally tried this: https://stackoverflow.com/a/5691067

Thats work! adding the ampersand keeps ChucK on time having access to R functions, I will try to explore this solution for now. In my case: Blocking : Std.system("Rscript corpus.R > out.log 2> /dev/null"); Non-blocking: Std.system("Rscript corpus.R & > out.log 2> /dev/null");

- use OSC to communicate with a separate long-running script that runs whatever you need

I currently use OSC to fetch the R data at each step, but you make me wonder if there is a better way best regards, federico

On Thu, Dec 31, 2020 at 3:33 AM federico lopez wrote:

...

Hi, Is the ChucK thread disrupted by the execution time of a Std.system script call?

In the code below, sporking a fast script, e.g. Std.system("sleep 0"), there is no noticeable disruption, but sporking a time consuming version e.g. Std.system("sleep 3") there is a disruption in the other sporks.

I'm trying to call R scripts using ChucK concurrency.

// test code, run with --caution-to-the-wind command-line flag Noise n => Envelope e => dac;

fun void metro() { while(true) { e.keyOn(); 10::ms => now; e.keyOff(); 990::ms => now; <<< now, "samples" >>>; } }

fun void callSystem() { while(true) { Std.system("sleep 0"); // comment this to test //Std.system("sleep 3"); // uncomment this to test 1000::ms => now; } }

spork~ metro(); spork~ callSystem(); while(true){10::ms => now;}

// end test code

_______________________________________________ chuck-users mailing list chuck-users@lists.cs.princeton.edu https://lists.cs.princeton.edu/mailman/listinfo/chuck-users

_______________________________________________ chuck-users mailing list chuck-users@lists.cs.princeton.edu https://lists.cs.princeton.edu/mailman/listinfo/chuck-users