This is from page three of the M3 manual:
"The M3 features 2 fully differential conversion channels, each with its own D/A converter, and analog level control circuitry. With our twin DAC design, the dynamic range for each channel is optimized by using the stereo ADI 1955 D/A converters in a mono configuration for PCM conversion, clocking is implemented with a technique called DDS (direct digital synthesis) which takes clock induced jitter to immeasurable levels. DSD is converted with our own proprietary one bit analog converter."
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