Re: [chuck-users] Expanding MIDI support

2 Jul 2019

      btw, I quickly tried sending SysEx from ChucK on MacOS Sierra 10.12.6 and
this seems to work, but it also sends spurious bytes when the msg is not a
multiple of 3.
Here's few lines of code I quickly put together to test this. I'll try on
Linux and it would be great if anybody could try on Windows as well.
On Mac I used MidiMonitor to check the MIDI out, on Windows a virtual port
and something like Pd or Max should do the trick.
No luck in receiving SysEx though, but I don't give up :P

//-------------------SYSEX-TEST-------------------
MidiOut m_out;
MidiMsg msg;

m_out.open(0); // select MIDI out

while( true )
{
    sysex_gen() @=> int buffer[];
    for( 0 => int c; c < buffer.size(); c++)
    {
        chout <= buffer[c] <= " ";
    }
    chout <= IO.nl();
    send_sysex( m_out, msg, buffer );
    2::second => now;
}

function int[] sysex_gen()
{
    Math.random2( 6, 128 ) => int length;
    int buffer[ length ];
    240 => buffer[0];
    247 => buffer[ length - 1 ];
    for( 0 => int c; c < length - 2; c++ )
    {
        Math.random2( 0, 127 ) => buffer[ c + 1 ];
    }

    return buffer;
}

function void send_sysex( MidiOut out, MidiMsg msg_out, int sys_msg[] )
{
    for( 0 => int c; c < sys_msg.size(); c++ )
    {
        if( c % 3 == 0 )
        {
            sys_msg[c] => msg_out.data1;
            if( c == sys_msg.size() - 1 )
            {
                0 => msg_out.data2;
                0 => msg_out.data3;
                out.send( msg_out );
            }
        }
        else if( c % 3 == 1 )
        {
            sys_msg[c] => msg_out.data2;
            if( c == sys_msg.size() - 1 )
            {
                0 => msg_out.data3;
                out.send( msg_out );
            }
        }
        else if( c % 3 == 2 )
        {
            sys_msg[c] => msg_out.data3;
            out.send( msg_out );
        }
    }
}

On Tue, 2 Jul 2019 at 22:15, Michael Heuer  wrote:
...
Great, thanks!  I'll start a new thread asking how best to use it!
michael
On Jul 2, 2019, at 3:53 PM, Mario Buoninfante 
wrote:
Nice :)
MIDI clock works fine now (ChucK 1.4.0.0). There's a flag you can use to
activate it that I don't remember whether is ON or OFF by default, but
anyway is there.
Like I said there's a flag for SysEx as well, but that doesn't seem to do
much.
Cheers,
Mario
On Tue, 2 Jul 2019 at 21:43, Michael Heuer  wrote:
...
I'd say go for it!  It would be nice to have proper SysEx and MIDI clock
support in ChucK.
I recall there was some progress on the latter; did I read somewhere that
clock messages are available via RtMidi but simply disabled in ChucK for
performance reasons?
michael
...
On Jul 2, 2019, at 3:23 PM, Mario Buoninfante <
mario.buoninfante@gmail.com> wrote:
Hi everybody,
One month ago I got started with an Open Source project whose goal is
to support some hardware on various platforms/environments/programming
languages (Pd, SC, Processing, Lua, Python, JS, etc.) and of course my goal
is to have ChucK on board as well (hopefully I'll share more info about the
project in the next months).
The only issue I've got at the moment is that I need to talk SysEx with
these gears, and as you know ChucK doesn't deal with SysEx.
I really care a lot about this project, mainly because it's open source
and because will involve different communities (Pd, SC, JS, etc.) and would
really love to include ChucK in this since is the tool I'm mainly using to
experiment and make music and I truly believe has got something more than
other languages/environments.
Thus, since I'm not a C++ person, I decided I'll ask a colleague of
mine (a C++ programmer) to help out with this, also because he'll get
involved in the project for other reasons anyway.
But before doing this I wanted to ask the developers and all those who
are involved in maintaining ChucK, if there's any particular reason why
SysEx messages are not currently supported.
From what I can see in the code (and after running few experiments)
with the current architecture SysEx messages could be sent out (3 bytes at
time though) but with a lot of limitations (didn't manage to receive SysEx
messages though).
Also, I think RtMidi doesn't gate us from doing that (there's just a
flag used to 'turn on/off' SysEx communication).
But it seems like there's nothing in place that allows to deal with
MIDI messages bigger than 3 bytes and, from a "non-C++ person", it seems
one way to fix this could potentially be to add a SysExIn/SysExOut and a
SysExMsg classes that deal with these kind of MIDI messages.
Of course there could be a lot of things I'm missing here, and that's
why I'm asking you for some help, even before asking for other help :)
Just to make sure there's nothing that prevents people from adding this
functionality.
Then, last but not the least, ChucK is an open source project and I
love it. There are a lot of people working with it, and I was wondering
whether or not this would be a feature people are after.
Basically I'd like to hear from the community before even getting
started with this.
I hope this makes sense. Looking forward to hearing from you guys :)
Cheers,
Mario
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