This is interesting. I wonder how the Yamamoto would stack up now that there is "state of the art" USB-SPDIF converters like the Stello U3. Feed the Yamamoto a near-perfect digital signal and let it use just its converter and discrete analog circuits.
I have Srajan's "other" DAC- the Burson 160-D- waiting to see how he compares it to the Metrum.
I have Srajan's "other" DAC- the Burson 160-D- waiting to see how he compares it to the Metrum.