Concero HD DAC Concero HD HIGH DEFINITION 32bit USB DAC and SPDIF DAC. DSD and DXD (24b/352.8kS/s). CONCERO HD connects the Resonessence upgradable FPGA based DSP engine to the new 32bit ESS ES9018-2M Sabre DAC for high performance, high sample-rate PCM up to DXD rates (352.8kS/s) from the USB Audio 2.0 port. In addition, it also contains the Resonessence 4x up-sampling filters that will accept 44.1kS/s and 48kS/s data streams from USB or S/PDIF and convert them to 176.4kS/s and 192kS/s respectively. CONCERO HD activates the ES9018-2M’s internal DSD processing engine to support Direct Stream Digital (DSD64 and DSD128) from the USB Audio 2.0 port using DoP standard version 1.1. CONCERO HD can operate as a USB to S/PDIF bridge in all modes except the DSD128 mode (that more would result in an S/PDIF stream data rate that exceeds the S/PDIF specification. DSD64 however does work, DoP data packets are send out on the S/PDIF in that mode). CONCERO HD is designed from the ground up to deliver on the promise of Direct Stream Digital in addition to high sample rate PCM. It brings the latest ESS Sabre DAC chips and the latest standards in audio processing to your existing power amplifier and loudspeaker configurations.