netjack console & MIDI

[grz0zrg]

Hello,

is it possible to use MIDI within netjack in console mode ? I tried the sine synth example with faust2netjackconsole, audio work but there is no MIDI ports, i would like to control the synthesizer from a second computer which has connected MIDI devices.

[sletz]

I've added a --i and --o parameters for faust2netjackconsole in https://github.com/grame-cncm/faust/commit/7cf7bf1f55407fc1dde5f4b7485c6b069bb84aa6.

So now you can do:

faust2netjackconsole foo.dsp

and:

./foo --i 2 --o 3 to setup 2 MIDI input ports and 3 MIDI output ports.

Can you test and report?

[grz0zrg]

Tried with midiTester.dsp example file, i can see the I/O port on the jack server, connected them but there is no signals passing by

[sletz]

Second try in https://github.com/grame-cncm/faust/commit/d4ebf0a19dafb8aebb1d97694f63889aab4d0df0. I removed the --i and --o parameters. Two MIDI ports are always added: the first one is use internally to transmit control values. The second one should be usable for transmit MIDI. Blind commit here (nothing to they out), so you'll to test again.

[grz0zrg]

Thank you, MIDI seem to work (tested with midiTester.dsp and instruments), is there any reasons physicalModeling examples with MIDI don't take into account MIDI keyboard key frequency ? When i press a key, freq go to 0 resulting in an audio pop.

[sletz]

No reason. Can you trace the exact MIDI messages that are sent? Can you possibly test with a simpler polyphonic example?

[grz0zrg]

Tried with the example on this page : http://faust.grame.fr/examples/2015/10/01/organ.html

When i connect the MIDI keyboard to the first input port and press a key, frequency is set to zero, when i connect it to the second input port, nothing happen.

How can i trace the MIDI messages ?

[sletz]

Third try in https://github.com/grame-cncm/faust/commit/72d07c799535ce62d06e9e9e7a3056d126698d43

Now you'll have to explicitly activate MIDI at compile time, like:

faust2netjackconsole -midi foo.dsp

ans the second input port should be used.

[grz0zrg]

Wired the keyboard to the second input port on the organ example and still no sounds when pressing keys.

Also, i need to add -lpthread linker option (inside faust2netjackconsole script) each time i am running faust2netjackconsole after install.

[sletz]

I finally reworked the entire stuff:

faust2netjackconsole -h
faust2netjackconsole [-httpd] [-nvoices <num>] [-effect auto|<effect.dsp>] [-midi] [-osc] <file.dsp>
Use '-httpd' to activate HTTP control
Use '-nvoices <num>' to produce a polyphonic self-contained DSP with <num> voices, ready to be used with MIDI or OSC
Use '-effect <effect.dsp>' to produce a polyphonic DSP connected to a global output effect, ready to be used with MIDI or OSC
Use '-effect auto' to produce a polyphonic DSP connected to a global output effect defined as 'effect' in <file.dsp>, ready to be used with MIDI or OSC
Use '-midi' to activate MIDI control
Use '-osc' to activate OSC control

So you will have to add the appropriate parameters like:

faust2netjackconsole -midi -nvoices foo.dsp

I was able to test, it works here on OS X.

Note that faust2netjackqt tool has be reworked the same way.

[grz0zrg]

Thank you! Work great with -nvoices option. I will test this a bit more but all seem to work at first glance.

[grz0zrg]

Is there any reasons that -nvoices 2 does not produce any sounds with the organ example ? I was able to produce sounds with -nvoices 1 option but not by increasing the amount of voices.

[sletz]

Because "volume" slider was at 0 in the DSP code. Try this code:

import("stdfaust.lib");

midigate    = button ("gate");                              // MIDI keyon-keyoff
midifreq    = hslider("freq[unit:Hz]", 440, 20, 20000, 1);  // MIDI keyon key
midigain    = hslider("gain", 0.5, 0, 10, 0.01);            // MIDI keyon velocity

process = voice(midigate, midigain, midifreq) * hslider("volume", 0.5, 0, 1, 0.01);

// Implementation

phasor(f)   = f/ma.SR : (+,1.0:fmod) ~ _ ;
osc(f)      = phasor(f) * 6.28318530718 : sin;

timbre(freq)= osc(freq) + 0.5*osc(2.0*freq) + 0.25*osc(3.0*freq);

envelop(gate, gain) = gate * gain : smooth(0.9995)
                with { smooth(c) = * (1-c) : + ~ * (c) ; };

voice(gate, gain, freq) = envelop(gate, gain) * timbre(freq);