Luxman’s first Fluency digital-to-analog converter arises from original research by Kazuo Toraichi and associates at the University of Tsukuba and Seikei University. The system uses interpolation to achieve spectacular time-domain performance. It first appears in the DA-07 D-to-A converter, companion to the DP-07 CD transport. Learning from the Fluency DAC informs Luxman CD player designs to this day.