Tubes & Digital - Is There A Link?

Personally, I think that although the inclusion of certain tube circuitry in the system may possibly soften the digital sound, there is no way that a problem in the source can be improved by the downstream components. If the problem is not corrected at the source, all the other items in the chain can only color it, or lose some signal. Even a perfect playback system is only capable of revealing exactly what is on the source, and nothing more.

That said, I do believe that the tube additions to digital systems has become very popular to try to cover up some of the digital sound artifacts. I don't really think that "covering things up" is the proper way to go about solving the problem though. And a really good tube system won't do any "covering up" anyway. Also alot of "covering up" going on with cables in digital systems. And the quest for "non-fatiguing" speakers to "cover up" the "fatiguing" digital sound. And on, and on. It seems that many audiophiles spend thousands on trying to "cover up" the sound of the source item they picked.

It's funny how you never hear about any vinyl addict posting a question about how he can make his analog rig sound more "digital". :^)

I don't think the focus of tubed recording gear is to "correct" sonic deficiencies of digital but to attempt to deliver a higher quality reproduction. Tubes, inherently, are capable of producing a higher level of detail than solid state. Also, it's argued that tubes produce a more "natural sound" because they generate even-ordered harmonic distortions as do acoustic musical instruments, compared to the odd-ordered distortions produced by solid state. However, tubes are hampered when it comes to high frequency response and bass control. The "warm" sound produced by even-order harmonic distortions is magnified by output transformers (mostly) and, ironically, poor circuit design to some extent.
There is recording gear out there that uses OTL topology in order to take advantage of the tubes inherent qualities - not really to mask the digital sound but to minimize loss of detail in the entire audio recording chain. At least that's my $.02

I have a copy of an article that is about 5-6 pages long that discusses the history of the tube, the current uses of tubes / tube industry, the stopage of the development of the tube and why there is a resurgence in the development of the tube. The article basically states that tube development is becoming mainstream and that it is a micro varient similar to the solid state device that replaced it; but with tube design topology. If anyone is interested, I will see if I still have the article or can get my hands on a copy.

Chuck

GS5, what pro oriented equipment uses an OTL design?

Pendulum Audio and, I think, Mesa. I'm not in the recording biz - the Pendulum gear is something I read about in a guitar mag a while back.