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This module features the MSGEQ7 graphic equalizer display filter. It will give your arduino ears. Sound is broken down into seven frequency bands and the peak level for each band can be read. The seven frequencies measured are as follows: 63Hz, 160Hz, 400Hz, 1kHz, 2.5kHz, 6.25kHz and 16kHz. 
 
This module can be used to create sound visualizers, detect patterns in music or add sound activation to your microcontroller.

Applications

  • Detect patterns in music - make a robot dance!
  • Process the values read, then display on LEDs as a soothing visualization which changes with the music.
  • Pimp the interior lighting in your car so it pumps to the beat and twinkles to the high hats. 
  • Create / listen for fingerprints in certain sounds - voice analysis. 

Specification

  • Voltage: 5V
  • Size: 30 x 20mm
  • Weight: 5 grams

Parts List

  • Audio Analyzer Module (1 Unit)
  • Analog Cable (2 units)
  • Digital Cable (1 unit)

 

Arduino IDE Sample code

 
#include <audioanalyzer.h>//Version 1.2 for Spectrum analyzer
 
Analyzer Audio = Analyzer(4,5,0);//Strobe pin ->4  RST pin ->5 Analog Pin ->0
//Analyzer Audio = Analyzer();//Strobe->4 RST->5 Analog->0
 
int FreqVal[7];//
 
void setup()
{
  Serial.begin(57600);
  Audio.Init();//Init module
}
 
void loop()
{
  Audio.ReadFreq(FreqVal);//return 7 value of 7 bands pass filiter
                          //Frequency(Hz):63  160  400  1K  2.5K  6.25K  16K
                          //FreqVal[]:      0    1    2    3    4    5    6 
  for(int i=0;i<7;i++)           
  {
    Serial.print(max((FreqVal[i]-100),0));//Transimit the DC value of the seven bands
    if(i<6)  Serial.print(",");
    else Serial.println();
  }
  delay(20);
}

Audio Analyzer

  • Brand: DFRobot
  • Product Code: DFR-DFR0126
  • Reward Points: 15
  • Availability: 3
  • £18.23

  • Ex Tax: £15.19
  • Price in reward points: 200

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