Re: [chuck-users] trying to implement a midi sequencer in chuck

12 Feb 2022

      Im using jack with fluidsynth.

I had some confusion about whether each
spork had its own "now" but I did a
test script and that seems to be the case.

I have tried adding me.yeild in various
places but no joy.

I created a midi file with a triad in
in three tracks ..8 quarter notes.
The events seem to be correct
but the output is only the last
spork. Perhaps its a problem
with my setup.
If i play the file with fludidynth
I get what I expected.

Any suggestions appreciated.
thanks
-----
MidiFileIn min;
MidiOut mout;
MidiMsg msg;
string filename;
me.arg(0) => filename;
if( !min.open(filename) ){
   <<< "unable to open MIDI file:'",filename >>>;
    me.exit();
}
mout.open(0);
spork ~ track(1);
spork ~ track(2);
spork ~ track(3);
5::second=>now;

function void  track(int t) {
    10::ms =>now;
    while( min.read(msg,t))
    {
  <<>>;
      10::ms =>now;
	 msg.when=> now;
         mout.send(msg);
	 me.yield();
    }
}

1 0.000000 0 75 0 
2 0.000000 1 75 0 
3 0.000000 2 75 0 
1 0.000000 0 75 0 
2 0.000000 1 75 0 
3 0.000000 2 75 0 
1 0.000000 0 60 90 
2 0.000000 1 64 90 
3 0.000000 2 55 90 
1 18000.000000 0 60 0 
2 18000.000000 1 64 0 
3 18000.000000 2 55 0 
1 0.000000 0 60 90 
2 0.000000 1 64 90 
3 0.000000 2 55 90 
1 18000.000000 0 60 0 
2 18000.000000 1 64 0 
3 18000.000000 2 55 0 
1 0.000000 0 60 90 
2 0.000000 1 64 90 
3 0.000000 2 55 90 
1 18000.000000 0 60 0 
2 18000.000000 1 64 0 

On Sat, 12 Feb 2022 10:22:17 -0800
Forrest Curo  wrote:
...
So how is this going to change their timing? It shouldn't, unless some
process somewhere keeps running and won't yield when the wait ends
(and the waiting spork wants to start from there.)
Jack or fluidsynth -- or what?
On Sat, Feb 12, 2022 at 9:55 AM Curtis Ullerich
 wrote:
...
"advancing time" means "yield for this long." so the other shreds
will be executing, or yielding, as their own timing dictates.
On Sat, Feb 12, 2022, 06:40 Forrest Curo 
wrote:
...
"Advancing time on a spork" means to "Wait until this amount of
time has elapsed."
If one spork is waiting for time to elapse, the others will be
doing... what?
On Fri, Feb 11, 2022 at 1:36 PM d  wrote:
...
Yes,thats the one I modeled mine after.
I removed the ugen stuff and replaced it with
send (midiout).
I have fluidsynth on jack The behaviour is strange.
It appears that advancing time on a spork advances
time in others and events get missed
But I could be wrong. I have notes with
no note off and CC that never happens
It works fine for single track files.
On Fri, 11 Feb 2022 13:10:20 -0800
Dana Batali  wrote:
...
Hi Davud,  have you seen this example?
https://cannerycoders.com/docs/chuck/examples/midi/midifile-play.html
One obvious point is that min.read accepts a track number.
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On Fri, 11 Feb 2022 13:10:20 -0800
Dana Batali  wrote:
...
Hi Davud,  have you seen this example?
https://cannerycoders.com/docs/chuck/examples/midi/midifile-play.html
One obvious point is that min.read accepts a track number.
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