I don't believe that the 990 will have DSP modes like "hall" or "jazz club" - the Model 950 left those off at the near-unanimous request of the forum three years ago, and I've heard no mention of them returning for the 990 or the 1070. As for the DAC's, the FAQ indicates that it is using Analog Devices 1852 24/192 DAC for all channels and Analog Devices 1896 Asynchronous Sample Rate Converter for stereo up-conversion.