Topic: JB3 - analog input

[dklein]

Some more info for anyone using the JB3 without an external a>d.  As usual, my fuckups led to a testing binge.  I have messed up so many analog recordings with this thing for one reason or another.  First the input jack, then the input selection and gain settings.  I think I've finally got it though!  Wish I did this a while ago 

http://ca.geocities.com/dkleined@rogers.com/audio/ and click on the Analog Input recording on the Jukebox 3

[rowjimmy]

Great stuff, as usual. Thanks for the info and the effort. Saves me from f*cking up something in the future, no doubt.

(now i just gotta finish gathering my gear - ebay here I come!)

[twatts (pants are so over-rated...)]

You rule!  Thanks for all the great NJ3 stuff...

Terry

[Simp-Dawg]

just gotta +T ya david, always posting quality info and you seem to really have a good understanding of the equipment you use and the principles that apply to our hobby

[Kindguy]

just gotta +T ya david, always posting quality info and you seem to really have a good understanding of the equipment you use and the principles that apply to our hobby

Yep T+

[InfiniteOhms]

very nice +T

[dklein]

just gotta +T ya david, always posting quality info and you seem to really have a good understanding of the equipment you use and the principles that apply to our hobby

Now I'm blushing...thanks Simp.  There are some areas I'm totally comfortable with and others that are a complete mystery.  Prepare for the onslaught of mic placement questions when I get my 184s next week!

[Ed.]

wow, thats interesting to know about the gain feature.  i was always told and just about everywhere i read i was told to up the db in post production, guess i won't do that anymore.  only i just bought a ua-5 so i don't really need to use the gain on the jb3.

good to know anyway tho.  +t

ed

[twatts (pants are so over-rated...)]

On the subject of the gain from the UA5 into the NJ3, I've found that NJ3 can handle peaks very well so far...  My UA5 was flashing like a firetruck at the recent Lake Trout show at the very beginning...  I turned down...

Later at home, I discovered the first part was fuller and better...  I shouldn't have turned down...

Oh well, you live, you learn, you tape some more!

Terry

[Brian Skalinder]

On the subject of the gain from the UA5 into the NJ3, I've found that NJ3 can handle peaks very well so far...  My UA5 was flashing like a firetruck at the recent Lake Trout show at the very beginning...  I turned down...

Later at home, I discovered the first part was fuller and better...  I shouldn't have turned down...

Oh well, you live, you learn, you tape some more!

Terry

Actually, I think this just indicates either

[a] the UA-5 handles overs gracefully, or
you haven't quite sorted out the exact levels at which to run the UA-5 for optimum gain without nasty overs (this is difficult to do with a single flashing light for monitoring levels!).

The JB3 in the UA-5 > JB3 application is just a storage device, it doesn't have an impact for how your setup handles peaks/overs - that's all on the UA-5.

Unless, of course, you're running analog into the JB3 in which case you should tell me to jump in the lake.  

[dklein]

Flashing on the UA-5 occurs at -3dB.  You still have a little room there.  What you don't want is constant light.  If you want to get a feel for how the 2 devices respond on the meters, plug an FM tuner into the UA-5 (like a walkman?) and tune in some plain old FM hiss (roughly white noise).  Slowly turn the gain up on the UA-5, watching the meters on the JB3 and the peak lights on the UA-5.

You can see how much the UA-5 light needs to be on before you're truly clipping (and if memory serves, you can even get away with the odd 'over' on the JB3 -  pop your recorded wave into a wave editor to check out the levels and see if it's actually over).  This is related to the calibration of the meters and may vary from unit to unit.