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Pre-amps/Signal Flow question on DIGI 002 rack
Hey!
Does anyone know if the pre-amps are totally bi-passed (True-Bypass) when using the line channels 1 trough 4 on a Digi 002. Do they become line-level channels like inputs 5 through 8??? How does the signal flow??? EX: Exterior Pre-Amp ...to... Line Input or Exterior Pre-amp ...to... Digi 002 Pre-amp Bypassed ...to... Line Input Any infos would be greatly appreciated!!!! Thanks Mark |
#2
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Re: Pre-amps/Signal Flow question on DIGI 002 rack
I'd like to hear the story from Digi but since the input impedance is different on the jacks:
Inputs 1-4 (XLR): 2 kohm Inputs 1-4 (1/4"): 10 Mohm I suspect the mic pre is bypassed.
__________________
Park The Transfer Lab at Video Park Analog tape to Pro Tools transfers, 1/4"-2" http://www.videopark.com MacPro 6 core 3.33 GHz, OS 10.12.1, 8 GB RAM, PT12.6.1, Focusrite Saffire Pro 40, PreSonus DigiMax, MC Control V3.5, dual displays, Neumann U-47, Tab V76 mic pre, RCA 44BX and 77DX, MacBook Pro 9,1, 2.3 Mhz, i7, CBS Labs Audimax and Volumax. Ampex 440B half-track and four-track, 351 tube full-track mono, MM-1100 16-track. |
#3
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Re: Pre-amps/Signal Flow question on DIGI 002 rack
Yeah I guess it would mean it's bypassed.
Thanks! Mark |
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Re: Pre-amps/Signal Flow question on DIGI 002 rack
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#5
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Re: Pre-amps/Signal Flow question on DIGI 002 rack
Are you shure? Most mixers can bypass the preamp (going line in) and you can still use the faders.
Pepo |
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Re: Pre-amps/Signal Flow question on DIGI 002 rack
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#7
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Re: Pre-amps/Signal Flow question on DIGI 002 rack
[/QUOTE] There is a simple test. If you select line, but the gain control still works, the preamps are not bypassed, merely padded. [/QUOTE] No. that is not necessarily true. Take a look at some audio mixer signal path line drawings. By switching to another jack, like switching between an XLR and 1/4", you can easily bypass the pre amp stage and send the 1/4" directly to the make-up gain stage.
__________________
Park The Transfer Lab at Video Park Analog tape to Pro Tools transfers, 1/4"-2" http://www.videopark.com MacPro 6 core 3.33 GHz, OS 10.12.1, 8 GB RAM, PT12.6.1, Focusrite Saffire Pro 40, PreSonus DigiMax, MC Control V3.5, dual displays, Neumann U-47, Tab V76 mic pre, RCA 44BX and 77DX, MacBook Pro 9,1, 2.3 Mhz, i7, CBS Labs Audimax and Volumax. Ampex 440B half-track and four-track, 351 tube full-track mono, MM-1100 16-track. |
#8
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Re: Pre-amps/Signal Flow question on DIGI 002 rack
The pre-amp is not bypassed when using the line inputs 1-4 - the pre-amp stage is the same between both, with only the gain and impedance being different.
If you need a true line input, you should use inputs 5-8. |
#9
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Re: Pre-amps/Signal Flow question on DIGI 002 rack
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[/QUOTE] No. that is not necessarily true. Take a look at some audio mixer signal path line drawings. By switching to another jack, like switching between an XLR and 1/4", you can easily bypass the pre amp stage and send the 1/4" directly to the make-up gain stage. [/QUOTE] You are missing the point. If you have two discrete inputs, where the line input joins the channel strip after the preamp, then yes, you have a true line input. However, these days, and particularily in the low end of audio, the line input is simply wired behind the microphone input jack, with a pad to allow a line level in. It's a cost issue. In this case, you are still going through the preamp. And since the trim pot is part of the preamp, the "line" signal is also attenuated using this control. Which will reveal to you whether or not you have a true line input. |
#10
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Re: Pre-amps/Signal Flow question on DIGI 002 rack
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__________________
Park The Transfer Lab at Video Park Analog tape to Pro Tools transfers, 1/4"-2" http://www.videopark.com MacPro 6 core 3.33 GHz, OS 10.12.1, 8 GB RAM, PT12.6.1, Focusrite Saffire Pro 40, PreSonus DigiMax, MC Control V3.5, dual displays, Neumann U-47, Tab V76 mic pre, RCA 44BX and 77DX, MacBook Pro 9,1, 2.3 Mhz, i7, CBS Labs Audimax and Volumax. Ampex 440B half-track and four-track, 351 tube full-track mono, MM-1100 16-track. |
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