"note on" when rotating a potentiometer

[RocktorT]

Hi!
How can you send a messages "note on" when rotating a potentiometer?

[tttapa]

Does this help? #161 (comment)

[RocktorT]

No, I want that when the voltage on the analog input changes from 0 to Vcc, notes from C1 to C4 are sent sequentially with a constant velocity

[tttapa]

In that case you only need a minor change to the ContinuousNoteSender::send function: map the value to an offset in the range 0-36, and use address + offset as the address, and a constant value for the velocity.

[RocktorT]

thanks, I'll try to figure it out

[RocktorT]

when compiling #161 (comment) an error occurs:

C:\Users\user\AppData\Local\Temp.arduinoIDE-unsaved2023930-4268-1h25ii0.sms3\sketch_oct30b\sketch_oct30b.ino:10:57: error: expected template-name before '<' token
struct NotePotentiometer : MIDIFilteredAnalogAddressable {
^
C:\Users\user\AppData\Local\Temp.arduinoIDE-unsaved2023930-4268-1h25ii0.sms3\sketch_oct30b\sketch_oct30b.ino:10:57: error: expected '{' before '<' token
C:\Users\user\AppData\Local\Temp.arduinoIDE-unsaved2023930-4268-1h25ii0.sms3\sketch_oct30b\sketch_oct30b.ino:10:57: error: expected unqualified-id before '<' token
C:\Users\user\AppData\Local\Temp.arduinoIDE-unsaved2023930-4268-1h25ii0.sms3\sketch_oct30b\sketch_oct30b.ino:18:19: error: elements of array 'NotePotentiometer pots []' have incomplete type
NotePotentiometer pots[] = {
^~~~
C:\Users\user\AppData\Local\Temp.arduinoIDE-unsaved2023930-4268-1h25ii0.sms3\sketch_oct30b\sketch_oct30b.ino:18:19: error: storage size of 'pots' isn't known

exit status 1

Compilation error: expected template-name before '<' token

[RocktorT]

what am I doing wrong?

[RocktorT]

I found a working sketch:
#893

[RocktorT]

I removed everything related to the encoder from there and left only one potentiometer.
Only here, when the pot is rotated, one note is sent with a variable velocity, but I need the note to change, but the velocity remains constant.

[RocktorT]

#include <Control_Surface.h> // Include the Control Surface library

struct ContinuousNoteSender {
void send(uint8_t value, MIDIAddress address) {
Control_Surface.sendNoteOn(address, value);
}
static constexpr uint8_t precision() { return 7; }
};

struct NotePotentiometer : MIDIFilteredAnalog {
NotePotentiometer(pin_t analogPin, MIDIAddress address)
: MIDIFilteredAnalog(analogPin, address, {}) {}
};

USBMIDI_Interface midi;

using namespace MIDI_Notes;
NotePotentiometer pots[] = {
{A0, note(C, 4)},

};

void setup() {
Control_Surface.begin(); // Initialize Control Surface
}

void loop() {
Control_Surface.loop(); // Update the Control Surface
}

[RocktorT]

I did it!
#include "Control_Surface.h" // Include the Control Surface library

struct ContinuousNoteSender {
void send(uint8_t value, MIDIAddress address) {

  int delta = constrain(value, 0, 36);

  Control_Surface.sendNoteOn(address + delta, 100);
//Serial.println(value);

}
static constexpr uint8_t precision() {
return 7;
}
};

struct NotePotentiometer : MIDIFilteredAnalog {
NotePotentiometer(pin_t analogPin, MIDIAddress address)
: MIDIFilteredAnalog(analogPin, address, {}) {}
};

USBMIDI_Interface midi;

using namespace MIDI_Notes;
NotePotentiometer pots[] = {
{ A0, note(C, 4) },
};

void setup() {
Control_Surface.begin(); // Initialize Control Surface
//Serial.begin(9600);
}

void loop() {
Control_Surface.loop(); // Update the Control Surface
}

[RocktorT]

or rather, my son did)))