Abstract: A multimedia method and apparatus is able to digitally mix audio signals to produce combined audio output signals. Prior to digital mixing, the audio input signals are de-formatted using a digital de-formatter, volume adjusted using digital volume controllers and converted to a common sampling rate utilizing a digital interpolator or decimator.

Abstract: An apparatus and method for digital mixing and sample rate conversion in a computer system is disclosed. The fully digital mixer of the present invention comprises: 1) a digital input receiver for receiving a plurality of digital data input signals and a corresponding plurality of input clock signals. The digital input receiver also receives an output clock signal. The digital input receiver further includes a data rate converter for converting the plurality of digital data input signals to a sampling rate corresponding to the output clock signal. The data rate converter produces a plurality of converted digital data output signals; 2) a digital filter unit coupled to the digital input receiver. The digital filter unit includes a plurality of digital filters for filtering the plurality of converted digital data output signals to produce a plurality of filtered digital data output signals; and 3) a digital blending unit coupled to the digital filter unit.