[LAU] sortof OT -- ART tube pac preamp and compressor noisy?

Rusty Perez rustys.lists at gmail.com
Tue Aug 13 19:52:23 UTC 2013

Thanks Len and all,
Another totally basic question.
First, I'll try going in to one of the "line" inputs on the card.

But, am I correct, should the card mixer input level then be set to 0
DB to illiminate the work of another amplifier, and take advantage of
the work done by the tube pac?


On 8/13/13, Len Ovens <len at ovenwerks.net> wrote:
> On Tue, August 13, 2013 8:08 am, Rusty Perez wrote:
>> Fons, you're right. I'm going from the xlr out on the tube pack to one
>> of the xlr ins on the delta 1010lt. I kindof figured that was
>> understood since I mentioned the xlr connections, but one cannot
>> assume. Anyway, I'll look at the jumper situation. I really don't want
>> to take my machine apart though. :-)
>> Do I understand correctly that set on the mic setting, the card gives
>> the xlr ins a 60 db boost?
> That would make sense. The more costly delta 1010, comes with a breakout
> box where all the inputs are balanced line level inputs. My delta 66
> allows setting them to -10 or +8 (I think) through SW. The LT has
> unbalanced and mic. level. That is the use it is made for. I do not even
> know what "line level" for the LT is, but from the connector type I would
> think -10. Anyway, if the unit I am looking at on the ART web site is the
> one you have, there is also an unbalanced output. I would first try
> connecting that to one of the unbalanced inputs of your 1010lt. unbalanced
> is not all so bad as you might think so long as your cable is short and
> the environment is not too noisy. Remember that a lot of radio stations
> sit right under their transmitter tower where noise is a lot harder to
> deal with. Clean connecting surfaces do make a difference.
>> Also, when I get really close to my ART tube pac unit, I hear a quiet
>> humming from the box itself. Is this normal for a piece of equipment
>> with tubes in it? :-) Could this suggest a problem, and is this hum
>> introducing itself in to my signal at low levels.
> Maybe maybe not, it could be a transformer. The power filtering after that
> could still be ok. The level difference would still be the first thing to
> correct. Using a mic input for line levels is never a good idea. You are
> adding an extra gain stage you just don't need with all problems that
> gives. The hum may actually be coming from the 1010 in that case.
>> Thanks for mentioning the usb pre Len. I don't see it mentioned when
>> ever anyone talks about usb interface options on linux.
> I personally think the ART USBDualTubePre (yes they push all the words
> together like that) is a great deal. It is USB 1.1 which means 16 bit
> audio, but it also means it just works. It does mean being more careful
> with input level to get the best out of it, but the tube
> compression/limiting is quite helpful for that if used gently. I found it
> has less noise than the cheaper ART "USB Dual Pre Project Series" and a
> little more gain. But the USB Dual Pre Project Series is quite good too.
> The USBDualTubePre does have a S/Pdif output at 24bit which I use with my
> delta 66. It gives me a) two more mic preamps b) a different sound from
> the mic preamps in my Mackie mixer. The downside is that it becomes the
> master clock because it has no s/pdif or clock in. That and it's
> 16bit-ness kind of removes it from the "pro" side of things... but then
> the delta series interface is mostly considered high end amateur anyway.
> (even though almost any 16 bit sound card out preforms any of yester-years
> pro tape machines.)
> You can make good music with only a sound blaster as input... though the
> SB Live! has sync problems. The Ensonq PCI is quite good though. Probably,
> the HDA internal audio line input with a good external mic pre would do
> well too.... though I have found internal audio IFs tend to have much
> better output quality than input. Input is kind of hit and miss.
> Use your ears. Start making music now with what you have. Everything you
> learn now will help you when you upgrade. (Len wants yet another mic :)
> --
> Len Ovens
> www.OvenWerks.net

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