switch to trigger MIDI

I am trying to have a switch trigger notes that will be produced by a wave shield and then have a servo move about 20 degrees… i have a code and have gotten my music code to work and the switch and servo to work… but I can’t seem to get the switch to trigger the music… can anyone help?
this is my code thus far

#include <SoftwareSerial.h>



#include <SoftwareSerial.h>

SoftwareSerial mySerial(2,3);

#include <Servo.h>

 Servo myservo;



byte note = 0;
byte resetMIDI = 4;
int SwitchPin = 0; //switchpin on pin 7
int pos = 70;
int instrument = 0;
int LedPin = 13;



void setup()
{
 pinMode(SwitchPin, INPUT);
 pinMode(LedPin, OUTPUT);
 myservo.attach(9);

 Serial.begin(57600);
 mySerial.begin(31250);

 pinMode(resetMIDI,OUTPUT);
 digitalWrite(resetMIDI, LOW);
 delay(100);
 digitalWrite(resetMIDI, HIGH);
 delay(100);
 talkMIDI(0xB0,0x07,120);
 }


void loop()
{
 SwitchPin=digitalRead(7); //read pin 7
 myservo.write(pos); //puts servo to position 70 degrees
 delay(5);
 pos=constrain(pos,0,180);



if(SwitchPin==1)

{
  delay(500);
 //Serial.printIn(instrument,"Demo Fancy Sounds");
 talkMIDI(0xB0, 71, 0x79);
 Serial.print("Instrument:");
 //Serial.printIn(instrument, DEC);
 
 talkMIDI(0xC0, 71, 0);
 
 noteOn(0, 50, 60);
 delay(200);
 noteOff(0, 50, 60);
 delay(100);
 
 noteOn(0, 53, 60);
 delay(200);
 noteOff(0, 53, 60);
 delay(100);
 
 noteOn(0, 52, 60);
 delay(400);
 noteOff(0, 52, 60);
 delay(100);
 
 noteOn(0, 53, 60);
 delay(400);
 noteOff(0, 53, 60);
 delay(100);
 
  noteOn(0, 55, 60);
 delay(400);
 noteOff(0, 55, 60);
 delay(200);
 
  noteOn(0, 58, 60);
 delay(300);
 noteOff(0, 53, 60);
 delay(100);
}

myservo.write(pos=90);
}
void noteOn(byte channel, byte note, byte attack_velocity) {
  talkMIDI( (0x90 | channel), note, attack_velocity);
}

//Send a MIDI note-off message.  Like releasing a piano key
void noteOff(byte channel, byte note, byte release_velocity) {
  talkMIDI( (0x80 | channel), note, release_velocity);
}

//Plays a MIDI note. Doesn't check to see that cmd is greater than 127, or that data values are less than 127
void talkMIDI(byte cmd, byte data1, byte data2) {
  digitalWrite(LedPin, HIGH);
  mySerial.write(cmd);
  mySerial.write(data1);
  mySerial.write(data2);
}

but I can't seem to get the switch to trigger the music... can anyone help?

Not unless you tell us how the switch is wired.

 SwitchPin=digitalRead(7); //read pin 7

Really? I'd have never guessed.

myservo.write(pos=90);

A rather bizarre way of doing it.