Up & Over sampling Is one superior to the other?


I see many contrasting ideas on up sampling, and over sampling. I want to get a DAC quite soon and have gotten the impression from reading reviews, that up sampling is a more forward presentation and can be analytical.... over sampling is more resolving and refined, yet laid back sounding.

Have I the wrong thoughts here? or is therre any truth to those diffs?

Do tubes really make significant diffs over strickly solid state (given all else is resonably the same)?

I thought to try making sure before taking the plunge.

I am most grateful for any help here from those who have had both or either...
blindjim
Audioengr - I just realized you were referring to the North Star 192 DAC and not the Model 192 transport, but that raises another question. Why does North Star allow upsampling at the transport level? Is it indeed the same upsampler as in the DAC. If you use the transport and DAC together (I don't at the moment but am considering it for the I2S if my DAC cannot be upgraded to include an I2S input) I assume you just allow the DAC to upsample and don't engage the upsampling on the transport. True? Any comments would be appreciated.
"Why does North Star allow upsampling at the transport level? Is it indeed the same upsampler as in the DAC."

Identical. The reason is the I2S interface. It is evidently more efficient design-wise to upsample in the Transport and then output 24/192 to the I2S interface. The transport can also output native rate on the S/PDIF outputs.

When you use the Transport and DAc together with S/PDIF, the DAC does the upsampling only if you select this. With the I2S interface the transport always upsamples to 24/96 and the DAC does no upsampling.

Steve N.
The upsampled data, either using SRC on a computer or 24/192 from the Northstar transport is more dynamic, much smoother on vocals and more detailed than native 44.1.

Steve N.