It's rather difficult to say whether or not DSP
within a matrix switcher is -- how do you say... necessary
? -- but regardless of want versus need, Extron Electronics is providing the ends. The MPX Plus 866 is hailed as a "a revolutionary new multi-format matrix switcher with integrated audio digital signal processing," the industry's first to wed VGA, video and audio signal routing with ProDSP. Said audio processing platform is based on a 32 / 64-bit floating point DSP engine, which offers up "an extensive selection of audio DSP tools designed to facilitate audio system design, configuration, and commissioning." Pricing has yet to be made public, but given how specialized this is, don't count on it being cheap.