MICROCOMPUTER SYSTEMS 1 SulTan BINHUMOOD Final Project Presentation

PROJECT INFO My project idea is based on playing sound displaying different effects seen in everyday experiences.

EFFECTS  CHORUS chorus effect (sometimes chorusing effect) occurs when individual sounds are roughly the same and nearly (but never exactly) the same pitch converge and are perceived as one  ECHO A time-delayed electronic reflection of a speaker's voice.

CHORUS - CODING for(i = 0; i < BUFLEN; i++) { delay = (int)((1 - (cos(6.28 * 0.4 * input / 1000))) * 20); //eq'n for delay = D/2(1-(cos(2*pi*n*f)) delay = input - delay; //usage of the delay in the output equation if (delay < 0) { delay = delay; //if the value of the delay go below 0, it retakes 5000 samples } //it basically "goes back to the start" buffer1[input] = (short) (pIn[i * 2]); buffer2[input] = (short) (pIn[i * 2 + 1]); x = (int)(buffer1[input] + 2 * buffer1[delay] / 3); //2/3 is alpha, which is like a volume control;it controls the intensity of the effect's signal y = (int)(buffer2[input] + 2 * buffer1[delay] / 3); //x and y both have 16 bits stored in them if(input >= ) //if the number of samples go beyond 5000, resets it to 0 input = 0; else input++; pOut[i * 2]= (x); pOut[i * 2 + 1]= (y); // display output in the output buffer }

ECHO - CODING void Echo_Effect(short *pIn, short *pOut) { int i; short buffer1[1000]; short buffer2[1000]; static int input = 0; int x, y=0; for(i = 0; i < BUFLEN; i++) { buffer1[input] = (pIn[i * 2]) + (0.6 * buffer1[input]); buffer2[input] = (pIn[i * 2 + 1]) + (0.6 * buffer2[input]); x = (int) (buffer1[input]); y = (int) (buffer2[input]); if(input>= ) input = 0; else input++; pOut[i * 2] = (x); pOut[i * 2 + 1] = (y); // display output in the output buffer }

RUN PROJECT Run the actual project and show how the effects work. > First select Passthrough to show the actual sound > Next show Chorus Effect > Show Echo Effect

THE END Any questions about the project or suggestions to improve the project?