Question

IN C

Write a function in the form:

  void play( int key, int duration) // duration units are tenths of a second

which generates and prints samples of sin(w*t) for t=0,1,2,...,n-1 which represent a tone corresponding to piano key number key, where:

  n = (duration/10.0)*8000

  w = (2π440rkey-49)/8000

  r = 21/12

In the main program call your function to play the first three notes of three blind mice.

The first three notes are keys 44, 42, and 40 respectively. The frequency for a key on the keyboard is f = 440(2^1/12)^key-49

Answer 1

this is the C code:

#include<stdio.h>
#include<math.h>
void play( int key, int duration)
{
   int n= (duration/10.0)*8000;
   double pi=3.1415926535;
   double r=21.0/12.0;
   double w=(2*pi*440*r*key-49)/8000;
   int i;
   for(i=0;i<n;i++)
   {
       double x=i*w;
       double ans=sin(x);
       printf("%lf ",ans);
   }
   printf("\n");
}
int main()
{
   //let the duration is 1 second so we will pas 10 becasue it s given as 10th of second
   play(44,10);
   play(42,10);
   play(40,10);
return 0;
}

PLEASE UPVOTE