Developed entirely in-house by their engineering team, the design of Outline’s Warped Finite Impulse Response (WFIR) filters is now protected by a domestic patent and will soon enjoy the same status internationally. Italian Patent N. 102018000003311 has been awarded to this remarkable innovation.
WFIR filters are one of the key features found in Outline’s groundbreaking Newton FPGA processor, a unit which has been repeatedly described as a game-changer by audio professionals around the world. Its remarkable design and computing power – in a single rackspace, networkable chassis – provides the perfect ecosystem for WFIR filters.
Having already been awarded patents for Newton (click here for details), the company is justly proud of this latest acknowledgement and comments:
‘WFIR filters offer fundamental technical improvements over traditional FIR filters in that they operate on a semi-logarithmic scale, similar to the nature of human hearing. This means that they are able to maintain high filtering resolution over the entire audio range, even in the case of increasingly high sampling frequencies.’
‘WFIR technology also allows the use of raised cosine filters which provide a greatly enhanced level of accuracy in equalisation. They do require up to three times the computing power required for traditional FIR filters (not a problem with Newton’s onboard processing power), but in turn they provide up to 10 times the resolution on mid-low frequencies. They are also not subject to the latency artefacts suffered by FIR filters.’
While the technical performance and characteristics of WFIR filters can be definitively demonstrated by testing them on an Audio Precision rig, for users in the field they deliver clearly audible advantages in real-world situations, prompting one UK Newton owner to recently comment, “WFIR filters are something that need to be heard to be believed.” His experience mirrors that of many Newton users worldwide who have discovered the unique equalisation performance created by Outline’s engineering team.