Rerurn to Romy the Cat's Site


In the Forum: Didital Things
In the Thread: DAC Recommendations
Post Subject: … and how to interpret the result?Posted by Romy the Cat on: 7/11/2013
fiogf49gjkf0d
 decoud wrote:
Romy, have you ever considered trying with your three dacs the following experiment. You take a digital file and runit through each of the dacs. You then take the output and feed it back to your adc. You then take the resultant redigitized file and calculate the root mean square difference with the original. Obviously this measure is sensitive to the adc but comparatively between the three dacs it is valid.

Yes, this experiment might be done. It is easy to do it and it is easy to recognize the difference. However, to but how would you interpret the meaning of the difference? My 3 DACs are different topologies. Bidat is faked up delta-sigma. I said faked-up is because it has different interpolation methodology for long and short signals. Still, being   kind of delta-sigma it out a lot of noise individual bits. Lavry Gold is true Multibit R2R converter.  Not only it is discreet Multibit but it is probably the most properly made Multibit ever, with individual reference resistors that are responsible for each bits thermo-stabilized and in constantly re-measured and interpolation re-calibrated. If you look at -100dB noise after the Lavry Gold you will see the perfect individual bits. Pacific Microsonics is also a true Multibit but they made a LOT of further processing in there as the output of Pacific does not look like Multibit but rather it looks like a very good delta-sigma. They will have quantifiable difference but I do not think that I will be able to associate those differences with the way how the DACs sound. It is not to mention that I use then for different purpose. With Bidat I play only CEC TLO. With Lavry I play my 2x and 4x DAW and with Pacific I play only 2x and 4x files that I record on Pacific.  I for sure could make the experiment you ask but what will I do with the result of that experiment?

Rerurn to Romy the Cat's Site