?? echo.c
字號:
//Echo.c Echo effect changed with size of buffer (delay)
short input, output;
short bufferlength = 3000; //buffer size for delay
short buffer[3000]; //create buffer
short i = 0;
short amplitude = 5; //to vary amplitude of echo
interrupt void c_int11() //ISR
{
input = input_sample(); //newest input sample data
output=input + 0.1*amplitude*buffer[i]; //newest sample+oldest sample
output_sample(output); //output sample
buffer[i] = input; //store newest input sample
i++; //increment buffer count
if (i >= bufferlength) i = 0; //if end of buffer reinit
}
main()
{
comm_intr(); //init DSK, codec, McBSP
while(1); //infinite loop
}
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