Pringles Can Drums w/ Arduino

Creations & Ideas
8

Hello, @mrbombmusic,
I added MIDI_CREATE_DEFAULT_INSTANCE();, MIDI.sendNoteOn(60, 127, 1); , and modified the paremeter in Serial.begin(); from 9600 to 115200, luckly, it is successful to transfer midi signal to my Sonic Pi. My Sonic Pi can receive the correct midi signal and then produce the drum sounds. However, I still have some problems that I encounter.

The first problem is that my sensors will affect each other when I hit them. I set one of my sensors to represent snare, and another is set to represent bass, and then suppose I hit the snare one, it sometimes will produce not only snare sound but also bass sound, I hit the bass one, it sometimes will also produce not only bass sound but also snare sound. The sounds will not be generated at the same time, there is an order, suppose I hit the snare, it will produce snare sound first and then produce bass sound. I don’t know the reason, is it maybe because my sensors are too close to each other or the threshold I set is too low? ( But sometimes I try to use a stronger strength and a weaker strength to hit the piezo, surprisingly, the weaker one can produce sound, but the stronger one can not produce sound, I don’t know why this weird situation happens base on the same threshold. ) I find this problem is called “crosstalk” in a comment of a yt video. There is a man named " Oscar Abraham" in comment zone discussed the “crosstalk” problem, he suggested some methods to solve, however, frankly, I can’t understand.
The link of the video is below:
video
I want to know how to let them not affect each other just like the drums displayed in your first video.

The second problem is latency, when I hit my sensors, they sometimes can not respond( produce sound) immediately. The sound will delay for a little time( Although the delayed time is smaller than 1 second, I still can feel the delaying.) It is not real time enough to produce sound.
I also want to let my sensors be able to respond immediately just like the drums displayed in your first video.

The code below is my current Arduino code:

#include <MIDI.h>

MIDI_CREATE_DEFAULT_INSTANCE();

byte note = 0;            // The MIDI note value to be played
const int knockSensor1 = A0;
const int knockSensor2 = A1;
const int threshold1 = 40;
const int threshold2 = 20;

int sensorReading1 = 0;  
int sensorReading2 = 0;  
 
void setup() {
  Serial.begin(115200);
}
 
void loop() {
  
   sensorReading1 = analogRead(knockSensor1);
   sensorReading2 = analogRead(knockSensor2);
   
     if (sensorReading1 >= threshold1) {
        MIDI.sendNoteOn(65, 90, 1); 
        delay(1000);
      
     } 
     if (sensorReading2 >= threshold2) {
        MIDI.sendNoteOn(64, 90, 1); 
        delay(1000);
     }
 }

Please help me complete the midi drums whose the sensors will not affect each other and can respond immediately.
Oh, by the way, could you tell me what the scale of your piezos is? For example, size, frequency, and so on.
Thanks a lot ~