Digital audio effects processors are used mainly by musicians to create special effects such as chorus, flanging, reverberation, pitch shifting and distortion. These effects are normally created using analogue and/or digital techniques.

Investigate signal processing techniques used to process audio signals digitally. Design, build and test a digital audio effects processor to implement these techniques. The system specifications for the project are:

• Digital signal processing system
• Real-time implementation
• 16 Bits of resolution
• Sufficiently high sampling rate for adequate sound quality

After considering various hardware implementations, I decided to implement the system on a PC using the Sound Blaster 32 sound card from Creative Labs. I designed and built a 16-bit ISA DAC sound card to be used in conjunction with the SB 32, to allow full duplex 16-bit operation. The system supports a maximum sampling rate of 44.1kHz.

The program was implemented for the DOS platform using Borland C++ v3.1. The interface was written using Borland's Turbo Vision v1.0.

The program formed the basis of PC-SFX.