Tubes & Digital - Is There A Link?

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.

Tubes seem to add "fullness" rather than warmth. They also add depth and soundstage.

My pet theory is that the second harmonics help activate the location reponse of human hearing. A thin sound, such as a high-pitched beep, is often hard to locate. A harmonically rich sound of the same pitch is much easier to locate.

Why a resurgence of tubes when SS is measurably more accurate? My feeling is that digital/SS is losing something that is not being measured. The measurement standard, harmonic distorion of a single sine wave, is missing something.

I know about Fourier Analysis and the Super-Position Theorem but who said these audio systems are guaranteed linear? We're missing something.

Just my 2 cents.