Reference Design

Audio-Mojo: QF1D512 Simple and versatile FIR engine (SavFIRe) Development Board for Audio Applications

Quickfilter Technologies Audio-Mojo development board simplifies the task of adding precision digital filtering to audio applications, such as equalizers and crossovers used for sound shaping in speakers, headphones and headsets.

Source: Quickfilter Technologies, Inc.
6/30/2008

The Quickfilter Technologies Audio-Mojo development board enables quick and easy implementation of precision digital filtering using an embedded single-channel precision digital filter chip, the QF1D512 Simple and versatile FIR engine (SavFIRe). The Audio-Mojo also features an embedded audio codec which allows verification of audio performance using analog inputs and outputs.

The Quickfilter Technologies Audio-Mojo can be plugged into the QF1D512-DK Development Kit to allow viewing of filter performance as well as to edit or create new filter responses. Once the filters are designated to the user's satisfaction, they can be downloaded into non-volatile memory on the Audio-Mojo board which can subsequently be used in a standalone mode in the user's application.

When used in a standalone mode, the Audio-Mojo requires just a 5V external power supply. The user provides an analog input source(s). The filtered responses can then be monitored at the analog outputs. The same hardware can be used to split a single input into two frequency-separated channels, e.g. an audio crossover, or as a two-channel equalizer. Two sets of example filters are stored in non-volatile memory on the Audio-Mojo to illustrate both modes of operation.