Help with midi mappings

[fapplin]

I am using an old M-Audio Oxygen8 V2 keyboard controller. I don't have sliders on it, but it does have 8 rotary knobs (C1 - C8). When I connect it up to MIDI-OX (midi monitor) and I turn rotary knob C1, I see the following:

IN PORT STATUS DATA1 DATA2 CHAN NOTE EVENT
1 1 176 91 2 1 --- CC: Reverb Depth

I can tell that DATA2 are the values going up and down based on me turning the knob.

Can I use your:

{ 0x0, 0x11, "S1", NULL, Organ_SetDrawbarInv, 0},

with my rotary knobs? According to your docs, 0x0 is the channel and 0x11 is DATA1.

If I change mine with my values:

{ 0x1, 0x5B, "S1", NULL, Organ_SetDrawbarInv, 0},

It doesn't make any changes to the organ sound when I turn the knob. Obviously, I'm doing this wrong - can you tell me how to do this correctly.

[fapplin]

I was doing it on channel 1. I'll try channel 2. You've really done great work! Thanks. If I can make a suggestion - maybe put all of those settings in a config/ini/xml file. Then, there would be no need for recompiling. Just a thought. Frank Yahoo Mail - Email Simplified On Sun, Mar 9, 2025 at 12:08 AM, ***@***.***> wrote: Hi. I've only just started experimenting with this so may not be much help, apologies if I'm stating the obvious. I've noticed control changes only seem to effect notes on channel 2. What channel are you sending notes on? — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you authored the thread.Message ID: ***@***.***>

[marcel-licence]

XML would be nice but the requires the data upload too. Maybe I should add this optional in future.

I am not sure if the current configuration runs the upper and lower manual at the same time. In this case there was a function to switch between the two manuals to control which manual should be affected by control changes. Can you play two different "sounds" when switching between channel 1 and channel 2?

[marcel-licence]

Usually, I was sending notes on channel 1 (0)

[fapplin]

OK. Here's all that I changed in z_config.ino:

/* slider */ { 0x01, 0x5B, "C1", NULL, Organ_SetDrawbarInv, 0}, { 0x01, 0x5D, "C2", NULL, Organ_SetDrawbarInv, 1}, { 0x01, 0x05, "C3", NULL, Organ_SetDrawbarInv, 2}, { 0x01, 0x0A, "C4", NULL, Organ_SetDrawbarInv, 3},

I'm not sure what sounds I should be hearing.

When I turn knob 1, I hear it change from a clean note to the same note but with a hum that get louder as I increase the knob.

When I turn knob 2, I get a kind of vibrato that speeds up as I increase the knob.

I don't notice any changes on knob 3 and 4.

Frank

[marcel-licence]

It sounds to me that the linking is not correct yet.
I would like to recommend to add
#define MIDI_MONITOR_ENABLED
to your config.h and check the serial monitor when turning the knobs. It should display the assigned messages.

Best regards,
Marcel

[fapplin]

Knob 1:

2 | b1 5b 00 | Control Change | Channel 1 | Number 91 | Value 0

Knob 2:

2 | b0 5d 11 | Control Change | Channel 0 | Number 93 | Value 17

Knob 3:

2 | b0 05 02 | Control Change | Channel 0 | Number 5 | Value 2

Knob 4:

b0 0a 0b | Control Change | Channel 0 | Number 10 | Value 11

[marcel-licence]

Then the following code should work:

/* slider */ 
{ 0x01, 0x5B, "C1", NULL, Organ_SetDrawbarInv, 0}, 
{ 0x00, 0x5D, "C2", NULL, Organ_SetDrawbarInv, 1}, 
{ 0x00, 0x05, "C3", NULL, Organ_SetDrawbarInv, 2}, 
{ 0x00, 0x0A, "C4", NULL, Organ_SetDrawbarInv, 3},

[fapplin]

That worked! I'll try the other 4, now.

Thank you.

[fapplin]

So, with these settings:

`
{ 0x01, 0x5B, "C1", NULL, Organ_SetDrawbarInv, 0},
{ 0x00, 0x5D, "C2", NULL, Organ_SetDrawbarInv, 1},
{ 0x00, 0x05, "C3", NULL, Organ_SetDrawbarInv, 2},
{ 0x00, 0x0A, "C4", NULL, Organ_SetDrawbarInv, 3},

{ 0x00, 0x47, "S5", NULL, Organ_SetDrawbarInv, 4},
{ 0x00, 0x4A, "S6", NULL, Organ_SetDrawbarInv, 5},
{ 0x00, 0x54, "S7", NULL, Organ_SetDrawbarInv, 6},
{ 0x00, 0x07, "S8", NULL, Organ_SetDrawbarInv, 7},

`

the 8 knobs now all work on my M-Audio Oxygen8 V2 controller.

It only has 8 buttons that I could use, also (transport buttons).

Frank

[marcel-licence]

I've added your example to the .md file: https://github.com/marcel-licence/ML_SynthTools/blob/main/extras/midi_mapping.md

You can use buttons as-well.

You can create your own functions to switch between settings.

{ 0x01, 0x5B, "Button1", NULL, App_Button1, 0},

inline void App_Button1(uint8_t param, uint8_t value)
{
    if (value > 0)
    {
        Serial.printf("Button pressed\n");
    } 
else
  {
        Serial.printf("Button released\n");
    }
}

There are some functions already made to be used with some buttons

[fapplin]

Cool. Thanks.

I just wired this together, this morning, after getting working on a breadboard. I'll be adding an micro SD card breakout board from Adafruit, also. Give me a little board to try different MIDI code.

[marcel-licence]

That is nice. Thank you very much for sharing =) If you like you can give the organ pro a try too. It is just in demo mode but maybe nice to see what would be possible with the rotary effect. This can be controller by the buttons or a footswitch too

[fapplin]

Thanks for all of your help. I'm a retired programmer (started in the 80s doing FORTRAN). I started getting into working with microcontrollers on my last programming job at the University of Virginia. We did a lot of consciousness kind of studies. So, I got my first experience working with the little boards connected to an EEG. Now, they are a hobby.

[fapplin]

This is a device I created that let's me pick a key and a scale (can be user-defined) and it will set all of the white keys on a controller to that key and scale (black keys aren't used unless defined). This makes it easy for me to improvise music because I don't know how to play an instrument.

[fapplin]

A song I created using the fancier LCD touch display.

https://youtu.be/PdMYocV9J-I?si=qEQ-b35gkHB4P3m2

[fapplin]

This device does kind of the same thing, but lights up LEDs above the correct notes for a key and scale.