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Old 25th February 2013
  #25
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Quote:
Originally Posted by mike_mccue View Post
All you need to know is

If you plug a +4dBu output into a -10dBV input the signal is coming in 11.79dB hotter than the gear was designed for... turn something down.

If you plug a -10dBV output into a +4dBu input the signal is coming in 11.79dB quieter than the gear was designed for... turn something up.

it is simple.

best regards,
mike
Quote:
Originally Posted by pqlia View Post
I’ve read through this thread and I’m not a newbie to recording so really ought to know the answer to this… but other than changes in absolute level can a mismatch from preamp into soundcard affect the sound quality in any subtle way --- is it JUST simply a level thing ?
Yes, this will be on the final.*

*The only modifiers to Mike's clear, simple answer are:

Gear designed to operate at +4 is/was usually designed for professional operation, which is an old concept whereby people made money using recording equipment in places called "studios". As a result, this equipment often was well-designed, well-built and not made to a price point. As a result, it often had relatively low noise in normal operating conditions.

Gear designed to operate at -10 was usually consumer or "pro-sumer" gear, and often was designed for less critical operating conditions. As a result, it often had higher noise levels in normal operating conditions.

-10 equipment was, as the poster above noted, usually unbalanced, which could add to or exacerbate the existing noise, and could make interconnection with +4 gear somewhat hit-and-miss. There are a number of good references out there for how to do this (Rane had a good tech paper).

There are and were exceptions to these general rules. You're not going to hurt anything by looking at the interconnection guides, following their recommendations, and giving it a shot.

Then again, this whole thread could have been answered with a Google search.