Alien Voices using the Texas Instruments C5000 and C6000 DSP

Simple DSP using ring modulation to generate sum and difference frequencies as used in alien voices.

Two complete applications in C, one for the Texas Instruments C5000 fixed-point processor and the other for the TI C6000 floating-point processor. This self-teach application / laboratory is aimed at beginners to allow them to use DSP to generate strange sounds.

The digital signal processing is very simple indeed and consists of simply multiplying an audio input by a sine wave. This causes the output to
contain sum and difference frequencies.

The waveforms and FFTs of the output from the ring modulator are generated using the MATLAB source files. A series of typical results are given in a Word document.