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 Forum index » DIY Hardware and Software » ChucK programming language
Question about GuitarPro instruments in Chuck
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diegohn



Joined: Nov 06, 2014
Posts: 3
Location: Spain

PostPosted: Thu Nov 06, 2014 3:59 am    Post subject: Question about GuitarPro instruments in Chuck
Subject description: Can ChucK access midi instruments that are used in GuitarPro?
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Hello all.

I am relatively new to ChucK, but since I'm also learning programming I find it very useful for composing music, and I'm glad I found this forum. (This is the result of a very basic program I did Smile https://www.youtube.com/watch?v=T-XUmrJJ7ck)

I know there are unit generators in ChucK. However, I also have a program called GuitarPro, which has a lot of pre-defined midi instruments (guitars, organs, brass, etc). My question is: is there a way to access those instruments in ChucK?
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kingcrabmeat



Joined: Sep 04, 2014
Posts: 4
Location: US and A

PostPosted: Fri Nov 14, 2014 1:14 pm    Post subject: Reply with quote  Mark this post and the followings unread

It should be a simple matter of routing the MIDI output from ChucK to a virtual midi device in the system which is routed to the MIDI input of your virtual synth. Unfortunately, I can't provide more specific details.

It's probably safe to assume that a virtual MIDI device is not included by default in most operating systems, so you may have to resort to downloading and installing one from a third party. All that is left to do after that point should be a matter of learning how to access the virtual MIDI device from both software programs.
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diegohn



Joined: Nov 06, 2014
Posts: 3
Location: Spain

PostPosted: Tue May 10, 2016 4:24 pm    Post subject: Reply with quote  Mark this post and the followings unread

I come back here after some time Very Happy

Turns out GuitarPro is using the general midi set (Microsoft GS Wavetable synth, as I use windows).

So Chuck's midiout functionality allows me access to this instruments... it's not very intuitive (I'm glad I found this help online: https://lists.cs.princeton.edu/pipermail/chuck-users/2007-January/001426.html), but I figured out how to make a simple program with three instruments (I copy the code in case it's useful for somebody).

I wrote me.exit() at the end because, when I execute the MiniAudicle for a second time, if I haven't removed the existing shred or cleared the virtual machine the application crashes.

Code:

MidiOut mout;
0 => int port;
if( !mout.open(port) )
{
<<< "Error: MIDI port did not open on port: ", port >>>;
me.exit();
}
MidiMsg msg;

//specifying instrument (99) to be played on channel 0 (192)
192 => msg.data1;
99 => msg.data2;
mout.send(msg);

//specifying instrument (0) to be played on channel 1 (193)
193 => msg.data1;
0 => msg.data2;
mout.send(msg);

//specifying instrument (0) to be played on channel 9 -percussion- (201)
201 => msg.data1;
0 => msg.data2;
mout.send(msg);

//function to play note
fun void MIDInote(int channel, int note, int velocity)
{
channel => msg.data1;
note => msg.data2;
velocity => msg.data3;
mout.send(msg);
}

[60,62,64,67,69] @=> int notes[];

repeat(50)
{
   
Math.random2(0,notes.cap()-1) => int z1;
Math.random2(30,127) => int velocity1;
//noteOn message to channel 0
MIDInote(144, notes[z1], velocity1);

Math.random2(0,notes.cap()-1) => int z2;
Math.random2(30,127) => int velocity2;
//noteOn message to channel 1
MIDInote(145, notes[z2], velocity2);
   
.2::second => now;
//noteOff message to channel 0
MIDInote(128,notes[z1] ,velocity1);

Math.random2(0,notes.cap()-1) => int z3;
Math.random2(30,127) => int velocity3;
MIDInote(144, notes[z3], velocity3);

//noteOn message to channel 9 (percussion) --here second arg is the instrument
MIDInote(153, 60, 90);

.05::second => now;

//noteOff message to channel 9 (percussion)
MIDInote(137, 60, 90);

Math.random2(1,3) => int z;
0 => int percInstr2;
if (z==1) 55 => percInstr2;
    else 62 => percInstr2;
MIDInote(153,percInstr2,90);
   
.05::second => now;
MIDInote(137,percInstr2,90);
MIDInote(128,notes[z3] ,velocity3);

Math.random2(0,notes.cap()-1) => int z4;
Math.random2(30,127) => int velocity4;
MIDInote(144, notes[z4], velocity4);
.1::second => now;
MIDInote(128,notes[z4] ,velocity4);

//noteOff message to channel 1
MIDInote(129,notes[z2], velocity2);

   
}
2::second => now;
me.exit();


----
In Windows, for other programs / software or more complex instrument sets it may be possible to use loopMIDI, a freeware application (http://www.tobias-erichsen.de/software/loopmidi.html).
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