The Aura DSP 466 is a digital sound processor typically used for car audio systems (equalization, crossover, time alignment). The software is required to configure it via USB from a Windows PC. Before downloading, check that your device is indeed the Aura DSP 466 (sometimes labeled as AuraSound DSP466 or similar). The software is not compatible with other Aura DSP models like the 8.8 or 4.8 without checking first. 2. Where to Download the Software Aura does not always host old DSP software on their main site. Try these sources in order: