RISC processor which controls the audio part; this configuration safeguards against the audio latency of its PCI Express interface. 20K2 also has more I/O ports, a DDR SDRAM memory interface, and a built-in Universal Audio Architecture component. A big improvement in the X-Fi DSP over the previous Audigy design, is the complete overhaul of the resampling engine on the card. The previous Audigy cards had their DSPs locked at 48 kHz/16-bit, meaning any content that didn't match this format had to be resampled on the card in hardware, which resulted in serious intermodulation distortion. For the X-Fi, Creative completely rewrote the resampling engine and dedicated more than half of the power of the DSP to the process, resulting in a very clean resample. Furthermore, in "Audio Creation mode" with "bit-matched playback" option, the X-Fi can work with real 44,100 Hz sample rate without any kind of resampling or other signal processing. Applications Sound Blaster X-Fi series Third party Auzentech mentions only the DAC's ideal theoretical SNR being 120 dB (AKM AK-4396). See also AMD TrueAudio References External links OEM - Chips, creative.com Creative Technology products Audio acceleration