Abstract
The main objective of this project is to design a synthesizer that can convert mono audio signal into stereo audio signal. This synthesizer proves to be a handy hardware that allows enjoying stereo quality even though the source of the audio is mono. A graphical user interface is developed using MATLAB, which allows tuning the frequencies, gain and order of the digital filters in the synthesizer to adjust the enhancement in the audio quality. The functionality of the design is verified using the GUI initially and later on with the hardware implemented on the Cyclone II 2C35 FPGA of the Altera DE2 board. The heart of the synthesizer hardware design involves designing digital filters and interfacing several hardware components such as an Audio CODEC, SDRAM and Cyclone II FPGA. The algorithm to do the mono to stereo conversion is coded in Verilog and the Altera Quartus II design suite is used for simulations and synthesis. The project achieved satisfactory stereo audio quality from designed hardware.