Fht for two microphone real time

Projects Programming
1

Hello
I use fht code for analysis sound for two microphone real time
I send my code in here

But it didnt correct analysis two microhone and it just analysis once of microphon

Anyone can help me how can i slove this problem

2

Did you mean FFT code?

I think that you have serious translation problems. Isn't there any forum section for your language?

3

no fht library


#define LIN_OUT 1 // use the log output function
#define FHT_N 64 // set to 256 point fht
#define cbi(sfr, bit) (_SFR_BYTE(sfr) &= ~_BV(bit))
#define sbi(sfr, bit) (_SFR_BYTE(sfr) |= _BV(bit))
#include <FHT.h> 

int f;
int Rreal[FHT_N];
int Lreal[FHT_N];
int RMAG[FHT_N];
int LMAG[FHT_N];



void setup() {
  ADCSRB = 0;
  sbi(ADCSRA, ADEN); // Enable ADC
  sbi(ADCSRA, ADATE); // Auto trigger
  sbi(ADCSRA, ADSC); // Start conversion
  // 19.231 kHz
  sbi(ADCSRA, ADPS2);
  sbi(ADCSRA, ADPS1);
  cbi(ADCSRA, ADPS0); 
Serial.begin(115200); // use the serial port
}

void loop() {
cli();  // UDRE interrupt slows this way down on arduino1.0   
for (int i = 0 ; i < FHT_N ; i++) { // save 256 samples
while (!(ADCSRA & _BV(ADIF))); // wait for adc to be ready
ADMUX = (DEFAULT << 6) |0; // A0
sbi(ADCSRA, ADIF); // Clear interrupt flag
byte m0 = ADCL; // fetch adc data
byte j0 = ADCH;
int k0= (j0 << 8) | m0; // form into an int
k0 -= 0x0200; // form into a signed int
k0 <<= 6; // form into a 16b signed int
Rreal[i] = k0; // put real data into bins

while (!(ADCSRA & _BV(ADIF))); // wait for adc to be ready
ADMUX = (DEFAULT << 6) |2; // A2
sbi(ADCSRA, ADIF); // Clear interrupt flag
byte m2 = ADCL; // fetch adc data
byte j2 = ADCH;
int k2= (j2 << 8) | m2; // form into an int
k2 -= 0x0200; // form into a signed int
k2 <<= 6; // form into a 16b signed int
Lreal[i] = k2; // put real data into bins

}
for (int i = 0 ; i < FHT_N ; i++) {
fht_input[i]=Rreal[i];
delay(1);
}
fht_window(); // window the data for better frequency response
fht_reorder(); // reorder the data before doing the fht
fht_run(); // process the data in the fht
fht_mag_lin(); // take the output of the fht


for (uint8_t i = 2 ; i < FHT_N / 2 ; i++) {
RMAG[i]=fht_lin_out[i];
} 


for (int i = 0 ; i < FHT_N ; i++) {
fht_input[i]=Lreal[i];
delay(1);
}
fht_window(); // window the data for better frequency response
fht_reorder(); // reorder the data before doing the fht
fht_run(); // process the data in the fht
fht_mag_lin(); // take the output of the fht
sei();

for (uint8_t i = 2 ; i < FHT_N / 2 ; i++) {
LMAG[i]=fht_lin_out[i];
} 


for (uint8_t i = 2 ; i < FHT_N / 2 ; i++) {
f=i * 9600UL / FHT_N;
Serial.print(f);
Serial.print(":");
Serial.print(RMAG[i]);
Serial.print(":");
Serial.println(LMAG[i]);
} 
delay(1000);
}
4

Explain what you expected to happen, and what happened instead. Cut and paste examples of the output into your post.

5

I want to anlysis sound realtime by two microphone and show analysis sound

I use this code instead analogeRead for 0 and 2 pins

It analysis just once of microphones.
Just A2 pin analysied

6

How do you know that? Prove it to us.

7

When run this code show anlysis sound but when disconnected wire of A0 pin , magnitude of frequencyis not decrease , but when disconnect wire of A2 decrease magnitude

8

A0 = Ground
A2 = 3.3V
Right: -32117 0V
Left: 8832 3.3V

A0 = Ground
A2 = 5V
Right: -32117 0V
Left: 32704 5V

A0 = 3.3V
A2 = Ground
Right: 8183 3.3V
Left: -32768 0V

A0 = 5V
A2 = Ground
Right: 31681 5V
Left: -32768 0V

The ADC seems to be reading the pins correctly so the problem must be elsewhere. Maybe your microphones are not wired correctly? If you use the sketch below, do your inputs average near 'zero' (2.5V).

#define LIN_OUT 1 // use the log output function
#define FHT_N 64 // set to 256 point fht
#define cbi(sfr, bit) (_SFR_BYTE(sfr) &= ~_BV(bit))
#define sbi(sfr, bit) (_SFR_BYTE(sfr) |= _BV(bit))
// #include <FHT.h>

int f;
int Rreal[FHT_N];
int Lreal[FHT_N];
int RMAG[FHT_N];
int LMAG[FHT_N];

void setup()
{
  ADCSRB = 0;
  sbi(ADCSRA, ADEN); // Enable ADC
  sbi(ADCSRA, ADATE); // Auto trigger
  sbi(ADCSRA, ADSC); // Start conversion
  // 19.231 kHz
  sbi(ADCSRA, ADPS2);
  sbi(ADCSRA, ADPS1);
  cbi(ADCSRA, ADPS0);
  Serial.begin(115200); // use the serial port
}

void loop()
{
  noInterrupts();  // UDRE interrupt slows this way down on arduino1.0
  for (int i = 0 ; i < FHT_N ; i++)   // save 256 samples
  {
    while (!(ADCSRA & _BV(ADIF))); // wait for adc to be ready
    ADMUX = (DEFAULT << 6) | 0; // A0
    sbi(ADCSRA, ADIF); // Clear interrupt flag
    byte m0 = ADCL; // fetch adc data
    byte j0 = ADCH;
    int k0 = (j0 << 8) | m0; // form into an int
    k0 -= 0x0200; // form into a signed int
    k0 <<= 6; // form into a 16b signed int
    Rreal[i] = k0; // put real data into bins

    while (!(ADCSRA & _BV(ADIF))); // wait for adc to be ready
    ADMUX = (DEFAULT << 6) | 2; // A2
    sbi(ADCSRA, ADIF); // Clear interrupt flag
    byte m2 = ADCL; // fetch adc data
    byte j2 = ADCH;
    int k2 = (j2 << 8) | m2; // form into an int
    k2 -= 0x0200; // form into a signed int
    k2 <<= 6; // form into a 16b signed int
    Lreal[i] = k2; // put real data into bins
  }
  interrupts();

  long TotalRight = 0, TotalLeft = 0;

  for (int i = 0; i < FHT_N; i++)
  {
    TotalRight += Rreal[i];
    TotalLeft += Lreal[i];
  }

  float AverageRight = TotalRight / (float) FHT_N;
  float AverageLeft = TotalLeft / (float) FHT_N;

  Serial.print("AverageRight = ");
  Serial.println(AverageRight);

  Serial.print("AverageLeft = ");
  Serial.println(AverageLeft);

  delay(5000);
}
9

Sample rate set 19200 but i think due to use two analog reads i decrease to 9600 SPS

10

Solve it

11

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