In 1989, Wadia introduced the DigiMaster filter system, a patented digital re-construction filter designed to specifically address the requirements of music reproduction. The DigiMaster system has become the heart of Wadia's approach, providing the best sonic performance of any re-construction filter available.

A digital filter system, sometimes refereed to as "Up-sampling", is the process of mathematically generating digital samples to “fill in the blanks” in a digital data stream. Up-sampling increases the digital data rate, reducing the demands on the analog filters used to smooth the signal during digital to analog conversion. Well-executed up-sampling can have a dramatic sonic benefit, resulting in a more accurate, realistic, and natural musical presentation.

Wadia’s patented DigiMaster system is a software based solution that runs on high powered Digital Signal Processors. DigiMaster uses a synchronous interpolation process to preserve the entire original signal and provide up to 2.8 MHz data rate – almost 30 times the data rate of 96 kHz up-sampling systems! The DigiMaster system uses 12th-order polynomial Spline curve fitting to generate up to 63 new samples for each original sample.

Digital filter systems are used in most digital playback systems and are designed to perform well on a small number of "bench" tests, such as frequency response, while sacrificing performance in other areas. The DigiMaster system provides balanced performance, producing excellent results in a wide range of tests, including phase and impulse response, which are critical to accurate and realistic reproduction of music.

Scientist and mathematicians have confirmed the technical excellence of the DigiMaster algorithm however it is the feedback from our customers that matters the most. Around the world audio enthusiast agree that Wadia’s innovative up-sampling process realizes the most compelling and engaging musical performance available.